One molecule of iodine (i2) and two molecules of sodium chloride (nacl) combine in a reaction. How many atoms are in the products?.
Answers
If one molecule of iodine and 2 molecules of sodium chloride combine in a reaction, the total number of atoms in the product would be 1.8066 x \(10^{23\) atoms.
Number of atoms in substancesAccording to Avogadro, each mole of any substance contains 6.022 x \(10^{23\) molecules or atoms of the substance.
Now, let's consider the reaction between iodine molecules and molecules of sodium chloride:
\(I_2 + 2NaCl -- > 2NaI + Cl_2\)
The products are 2 moles of NaI and 1 mole of \(Cl_2\). In other words, the total number of moles found in the products of the reaction is 3.
We said earlier that 1 mole is equivalent to 6.022 x \(10^{23\) molecules or atoms. We can extrapolate to calculate the number of atoms that will be present in 3 moles of products of the reaction.
1 mole = 6.022 x \(10^{23\) molecules or atoms
3 moles = 6.022 x \(10^{23\) x 3
= 1.8066 x \(10^{23\) atoms
In other words, the total number of atoms present in the products of the reaction is 1.8066 x \(10^{23\) atoms.
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Answer:
6 total atoms
Explanation:
One molecule of Iodine (I2) = 2 atoms. Because the subscript of 2 means that there are 2 atoms in that molecule.
Two molecules of sodium chloride 2(NaCl) = 4. Na = sodium, which is one atom, and Cl = chlorine, which is one atom. Together, NaCl = 2 atoms (1 + 1 = 2). Since there are two molecules of NaCl, multiply 2 by 2, which is 4. So, two molecules of sodium chloride = 4 atoms.
Together I2 + 2(NaCl) = 6.
Since chemical equations are always balanced (the Law of Conservation of Energy and Mass) the total amount of atoms in the products must equal the total amount of atoms in the reactants.
So the answer is 6.
Related Questions
PLEASE HELP!?Consumers must eat other organisms for energy. Which organisms are consumers in this food chain?
Answers
Answer:
Consumers must consume other organisms to get the food that they need and are known as Heterotrophs as they cannot make their own glucose. These consumers eat producers (plants). Herbivores are considered as first order consumers. These consumers eat consumers and producers (animals and plants).
Which of the following statements is true about the relationships between photon energy, wavelength, and frequency?
Group of answer choices
The photon frequency is proportional to energy and inversely proportional to wavelength.
The photon frequency is inversely proportional to energy and proportional to wavelength.
The photon frequency is proportional to energy and proportional to wavelength.
The photon frequency is inversely proportional to energy and inversely proportional to wavelength.
Answers
Answer: The Answer is A.
Explanation:
The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy. Equivalently, the longer the photon's wavelength, the lower its energy.
Hope this Helps!
The photon energy, wavelength, and frequency are the characteristic of the waves and particles. "The photon frequency is proportional to energy and inversely proportional to wavelength." Thus, option A is correct.
What is photon energy?Photon energy has been defined as the energy constituted by the photon of the atom. It is given by the product of Planck's constant and wave frequency. The frequency of the photons is in inverse relation to the wavelength. It is given as,
E = hυ = h c / λ
Here, E is energy, h is Planck's constant, c is the speed of light, υ id frequency, and λ is the wavelength.
On the other hand, the frequency is in direct relation to the energy. The higher the frequency of the photons higher will be its energy.
Therefore, option A. frequency is inversely proportional to the wavelength.
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When particles have more room to spread apart from each other, they will exert ????
pressure.
greater
less
the same amount of
Answers
Organize the following transformations in the order that will occur in the experiment.
copper (II) nitrate reacts with base to form Cu(OH)2
>
copper metal reacts with acid to form Cu(NO3)2
copper (II) hydroxide reacts with heat to form CuO
copper (II) oxide reacts with acid to form CuCl₂
copper (II) chloride reacts with a metal to reform copper metal
Answers
The correct organisation of the following transformation in order is as follows:
copper metal reacts with acid to form Cu(NO3)2copper (II) nitrate reacts with base to form Cu(OH)2copper (II) hydroxide reacts with heat to form CuOcopper (II) oxide reacts with acid to form CuCl₂copper (II) chloride reacts with a metal to reform copper metalWhat is a chemical reaction?A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
According to this question, a transformation involving copper metal is involved in this question. The copper metal begins by reacting with an acid (nitric acid) to form copper nitrate.
The correct order of the transformation of the copper metal through different phases is as given above.
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What best explains why sodium is more likely to react with another element than an element such as neon?
a.) Sodium has one fewer proton than neon.
b.) Sodium has fewer electron than neon.
c.) Sodium has one more electron than neon.
d.) Sodium has one more neutron than neon.
Answers
BAnswer:
Explanation:
N
Fossil fuels are an important natural resource used by society. which of the following best describes fossil fuels? a. they are any liquid fuel derived from once-living matter. b. they are organic fuels derived from ancient plants and animals. c. they are fuels in which dinosaur fossils are commonly found. d. they are naturally occurring inorganic fuels like coal and petroleum.
Answers
Fossil fuels are an important natural resource used by society and they are organic fuels derived from ancient plants and animals.
What are fossil fuels?Fossil fuels are the natural resources means they are derived from the ancient resdue of plants and animale due to theor decomposition under high temperature and pressure.
Fossil fuel may be present in solid, liquid as well as in gaseous form so the given option (a) is incorrect.This is the wrong assumption that in the fossil fuel we get the fossils of dinosaur, so option (c) is incorrect.They are not inorganic fuels infact they are organic fuels.So, fossil fuels are organic fuels derived from ancient plants and animals.
Answer:
B cuh
Explanation:
trust me cus im just smart like dat
identify the conditions for a standard electrochemical cell. select one or more: pressure of 1 atm temperature of 298 k solution concentrations of 1 m pressure of 5 atm solute masses of 1 g temperature of 273 k
Answers
The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.
The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.
There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.
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Please count compound list each element and the amount of each and then figure out the total of the atoms
NEED ANSWER ASAP
Answers
Answer:
Carbon: 18, Hydrogen: 16, Oxygen: 8
Explanation:
Total # of atoms = 42
Organic
In metallic bonds, electrons are referred to as electrons.
Answers
Answer:
Metallic bonding may be described as the sharing of free electrons among a lattice of positively charged metal ions. The structure of metallic bonds is very different from that of covalent and ionic bonds. ... In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize.
Consider the equilibrium equation for a general reaction: A + B C + D. Explain what happens to the reactants and products from Time 0 until the reaction reaches equilibrium.
Answers
Answer:
See explanation
Explanation:
For the equilibrium; A + B ⇄C + D
At time = 0 secs, the concentration of products is zero while the concentration of reactants decreases steadily.
As time goes on, the concentration of the reactants continues to decrease while the concentration of products increases.
At equilibrium the concentration of both reactants and products are now the same because the rate of forward reaction is equal to the rate of reverse reaction are now the same.
Which type of reaction does this diagram represent?
A small ball heads toward a large circle labeled superscript 235 upper U. An arrow points to an irregular circle labeled superscript 236 upper U. Another arrow points to a starburst, partially overlaid by 2 blobs labeled superscript 92 upper K r and superscript 141 upper B a, and with 3 small balls heading away from the starburst.
nuclear fusion because nuclei combine to form a heavy nucleus
nuclear fission because an atom is splitting into two large fragments of comparable mass
nuclear fusion because a large amount of energy is being released
nuclear fission because the resulting products are not radioactive
Answers
The diagram represents a (c) nuclear fission reaction because an atom is splitting into two large fragments of comparable mass.
Nuclear fission is a type of nuclear reaction in which the nucleus of an atom splits into two or more smaller fragments. This process is often accompanied by the release of a significant amount of energy. In the diagram, a small ball heading toward a large circle labeled superscript 235 upper U indicates the incident neutron or particle that triggers the fission reaction.
The arrow pointing to an irregular circle labeled superscript 236 upper U represents the nucleus of uranium-236, which is the result of the fission of uranium-235. Uranium-235 is a fissile isotope that can undergo fission when bombarded by a neutron. The irregular circle indicates the nucleus undergoing fission.
The starburst, partially overlaid by two blobs labeled superscript 92 upper K r and superscript 141 upper B a, represents the fission products. During nuclear fission, the nucleus of uranium-236 splits into two large fragments, in this case, krypton-92 and barium-141. These fragments are often radioactive and contribute to the release of energy during the fission process.
The three small balls heading away from the starburst represent the release of additional neutrons during the fission reaction. These neutrons can go on to initiate further fission reactions in a chain reaction, contributing to the sustained release of energy.
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Difference between Solute and solvet
Answers
Answer:
When one substance dissolves into another, a solution is formed. The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.
How many moles of carbon atoms are present
in 5.4 moles of glucose?
Answer in units of mol.
Answers
Answer:
32.4 mol
Explanation:
Given data:
Number of moles of C atom present = ?
Number of moles of glucose = 5.4 mol
Solution:
Glucose formula = C₆H₁₂O₆
There are 6 moles of C atoms are present in one mole of glucose.
In 5.4 moles of glucose:
5.4 mol × 6 = 32.4 mol
Chemistry help!
Zoom in to see better!!
Answers
Answer:
2.5 moles of Al
Explanation:
We'll begin by calculating the number of mole in 127 g of Al₂O₃. This can be obtained as follow:
Mass of Al₂O₃ = 127 g
Molar mass of Al₂O₃ = 101.961 g/mol
Mole of Al₂O₃ =?
Mole = mass / molar mass
Mole of Al₂O₃ = 127 / 101.961
Mole of Al₂O₃ = 1.25 mole
Finally, we shall determine the number of mole of Al that reacted. This can be obtained as follow:
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted to produce 2 moles of Al₂O₃.
Therefore, Xmol of Al will react to produce 1.25 moles of Al₂O₃ i.e
Xmol of Al = (1.25 × 4)/2
Xmol of Al = 2.5 moles.
Thus, 2.5 moles of Al is needed for the reaction.
When 70. g of Li3N(s) (molar mass 35 g/mol) reacts with excess H2(g), 8.0 g of LiH(s) is produced. The percent yield is closest to
Answers
The percentage yield for the reaction between \(Li_3 N_{(s)}\) and \(H_2\), which resulted in the production of \(LiH_{(s)}\), is 25%.
To calculate the per cent yield, we multiply the theoretical yield by 100.
There can be a significant difference in the theoretical and actual yield.
Li₃N(s) + 2 H₂(g) ⇄ LiNH₂(s) + 2 LiH(s)
\(70 g Li_3N *\frac{ 1 mol Li_3 N}{35 g} = 2 mol Li_3N\\2 mol Li_3N * \frac{2 mol LiH}{1 mol Li_3N} \\4 mol LiH * \frac{7.05 g LiH}{ 1mol LiH} = 28.20\)
Percentage yield = \(\frac{Actual Yield}{Theoretical Yield} * 100\)
\(\frac{8.0g}{28.20 g}\) ≅ 25
From the above calculation, we found that the per cent yield is closest to 25%.
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Your question is incomplete, the probable question is:
Li₃N(s) + 2 H₂(g) ⇄ LiNH₂(s) + 2 LiH(s) ΔH° = -192 kJ/molrxn Because pure H₂ is a hazardous substance, safer and more cost-effective techniques to store it as a solid for shipping purposes have been developed. One such method is the reaction represented above, which occurs at 200 °C. When 70 g of \(Li_3N_{(s)}\) (molar mass 35 g/mol) reacts with excess H₂(g), 8.0 g of LiH(s) is produced. The per cent yield is closest to:
Describe the unique properties of water and how they affect the following:
phase changes
physical properties
This is my answer. Is it ok? Do you have suggestions to make it better?
Unique properties of water are polarity, solvency, cohesion, adhesion, high boiling point, density and the ability to dissolve other substances. The three phases of water are solid (frozen), liquid and gas and are changed by temperature. Water molecules don't change between the phases, the molecules just interact differently to make the change.
Answers
Unique properties of water
Water molecules have a bent overall structure, partial positive charges on the hydrogens, partial negative charges on the oxygen, and are polar. This is due to the fact that oxygen is more electronegative than hydrogen, making it more effective at drawing electrons. Excellent solvents include water.
Temperature alters the three states of water, which are solid (frozen), liquid, and gas. Although the interactions of the water molecules change, the molecules themselves do not alter between the phases.
Water quality's physical characteristics
Color: Polluted water may be coloured; pure water is colourless.
Turbidity: Clear, light-unabsorbing water is the opposite of pure water.
Taste and odour: Pure water never has a taste or an odour.
How many distinct characteristics does water have?Given their polar nature, water molecules form hydrogen bonds. This gives water its distinctive properties, including polarity, solvency, cohesion, adhesion, high specific heat, and the capacity to act as a buffer. A solute that has dissolved in a solvent creates a homogeneous mixture known as a solution.
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What happens to the intensity of light emitted from stars the further away the star is from us?
Answers
Answer: stars vary in their effective temperature and colour. A hot star radiates more energy per second per metre surface area than a cooler star. Does this then mean that a hot star is going to appear brighter to us than a cooler one? The answer to this actually depends on a few factors
Explanation: pa brainiest po
If I initally have a gas at a pressure of 12 atm, a volume of 23 L, and a temperature of 200 K, and then I raise the pressure to 14 atm and increase the temperature to 300 K, what is the new volume of the gas?
Answers
Answer: 30 L
Explanation: Use the combined gas law: P1V1/T1 = P2V2/T2
We want V2, so rearrange:
V2 = V1(T2/T1)(P1/P2)
Note how I've grouped the temperature and pressure into ratios. This allows us to cancle those units quickly and gives a perspective on what we should expect. Enter the data:
V2 = (23L)*(0.6667)*(0.8571)
V2 = 29.6 L 30 L for 2 sig figs
Which of the following statements is true?
A. The change in freezing point of a solution is directly proportional to the number of
solute particles in the solution and dependent on the type of particle.
B. The change in freezing point of a solution is directly proportional to the number of
solute particles in the solution and independent of the type of particle.
C. The change in freezing point of a solution is inversely proportional to the number
of solute particles in the solution and dependent on the type of particle.
D. The change in freezing point of a solution is inversely proportional to the number
of solute particles in the solution and independent of the type of particle.
Answers
Answer:
The effect of adding a solute to a solvent has the opposite effect on the freezing point of a solution as it does on the boiling point. A solution will have a lower freezing point than a pure solvent. The freezing point is the temperature at which the liquid changes to a solid.
Explanation:
Hope this helps :3
The change in freezing point of a solution is inversely proportional to the number of solute particles in the solution and dependent on the type of particle,is the the TRUE statement.
What is meant by freezing point?Freezing point, temperature at which a liquid becomes a solid. As with the melting point, increased pressure usually raises the freezing point. The freezing point is lower than the melting point in the case of mixtures and for certain organic compounds such as fats.The change in freezing point of a solution is inversely proportional to the number of solute particles in the solution and dependent on the type of particle,is the the TRUE statement.
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which size of micropipette would you select to deliver 215 microliters?
Answers
The size of micropipette that you would select to deliver 215 microliters would be a micropipette with a volume range of 200-1000 microliters.
What is a micropipette?
A micropipette is a laboratory instrument used to measure and dispense small volumes of liquid, typically in the range of microliters (µL) or nanoliters (nL). They are commonly used in chemistry, biology, and biochemistry experiments, as well as in clinical and industrial settings.
Micropipettes consist of a handle, a digital or manual volume adjustment mechanism, and a tip that is placed into the liquid to be dispensed. They work by creating a vacuum or positive pressure inside the tip, which draws or pushes the liquid out of the tip.
Micropipettes come in different volume ranges and it is important to select the right one to ensure accurate delivery of the desired volume. For example, a micropipette with a volume range of 2-10 microliters would not be suitable for delivering 215 microliters, while a micropipette with a volume range of 200-1000 microliters would be more appropriate.
It's also important to note that, even if the micropipette is able to deliver 215 microliters, you should always check the calibration of the micropipette before use, to make sure that it's delivering the correct volume.
Hence, a micropipette with a volume range of 200-1000 microliters is suitable to deliver 215 microliters.
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Why are do some substances have larger or smaller densities than others?
Answers
Answer:
What is the particle model of matter?
How small are atoms and molecules?
How does the particle model of matter describe solids, liquids and gases?
How does the particle model of matter help us understand the process of diffusion?
How can materials be made to change their state?
How does the particle model of matter help us to understand changes of state in materials, such as melting, evaporation, condensation and freezing?
How are density, mass and volume related to each other?
How do the densities of solids, liquids and gases compare?
Which aspects of the particles in a given material influence the density of that material?
Why does oil float on water? Is this related to density?
How can the particle model of matter help us to understand expansion and contraction?
How does a gas exert pressure?
Is the pressure a gas exerts related to the number of gas particles? If so, how?
What happens to pressure when we change its volume and temperature?
Can you remember learning that matter can exist in three different states? What are the three states called?
Can you remember the properties of the different states of matter? Discuss this in your class. Look at the following diagram of the states of matter to help you. Remember to take some notes as you discuss in class.
Each state of matter behaves differently and the particles in each state behave differently. This diagram compares the particles in a gas, a liquid and a solid.
In this chapter we are going to review what we know about solids, liquids and gases. We are going to learn about a scientific model that can be used to describe how the particles in all three states behave. This model is called the particle model of matter and it will help us understand much more about the properties of solids, liquids and gases. Let's get started!
What is the particle model of matter?
scientific theory
phenomenon
disordered
uniform
random
reverse
controlled experiment
In the previous chapter we learnt that scientists use models when they want to describe things that are difficult to understand. We discussed a model of the atom that helped us to imagine what atoms look like.
This model of the atom shows us where the different sub-atomic particles can be found. The sub-atomic particles shown here are the proton, neutron and electron.
Theories are similar to models. They explain scientific phenomena (things and events that can be described and explained in scientific terms) using pictures and words.
What does the particle model of matter teach us?
The particle model describes matter in a very specific way. It describes four important aspects of matter:
All matter is made up of particles that are incredibly small - much too small to see with the naked eye. The particles can be atoms or combinations of atoms that are bonded.
There are forces between the particles.
The particles in matter are always moving. The more energy they have, the faster they move.
The spaces between the particles in matter are empty. You might assume that the spaces between particles are filled with air, but this is not the case. They contain nothing at all.
If you need to, turn back to chapter 1 to revise the terms atom, element, compound and molecule and how they relate.
Why is the particle model of matter so useful?
The particle model of matter is one of the most useful scientific models because it describes matter in all three states. Understanding how the particles of matter behave is vital if we hope to understand science!
The model also helps us to understand what happens to the particles when matter changes from one state to another.
The following diagram shows different changes of state, as well as which processes are the reverse of each other. Melting and freezing are the reverse processes of each other and so are evaporation (boiling) and condensation.
Under special circumstances, a solid can change directly into a gas without melting first. This process is known assublimation and its reverse (when a gas changes directly into a solid without condensing first) is called deposition.
Fill in the blanks and name the process.
What is the process of ____ reproduction where a cell makes ___ of itself?
Answers
Second blank: copies
How many atoms would be in 4.5 moles of Oxygen gas?
7.47 x 10-24 atoms O2
2.71 x 1024 atoms O2
4.5 x 1023 atoms O2
Answers
Answer:
2.70..would be number of moles..2.71×1024 atoms
How can I identify which substance is more thermal stable?
Answers
Sandwich that stays fresh for 7 years, other ‘neutraceutical’ wonders
In a laboratory outside Zurich in Switzerland, a food scientist engages in "creative appraisal" of natural food flavors. An example: a real banana having 225 natural flavor components can be duplicated with artificial alternatives using only nine ingredients.
The same company has now in store 20,000 synthetic varieties of flavor, 200 for strawberry alone. Givaudan, the Swiss firm, is the world’s biggest flavorings manufacturer and supplies one in every five artificially flavored foods in the world.
Artificial? "We prefer to call them "nature identical chemicals," says Dr. Heini Menzi, vice president for European research of Givaudan.
These days, emerging groups of professionals in some countries – food scientists they are called – are enmeshed in laboratory work. They are engaged in an awesome venture of working on "industrialized solutions" to maximize manufacturers’ profits and give more nutritional and medical benefits to consumers.
Their sustainable goal is to extend the shelf-life of food items. Manufacturers are enthusiastically pouring so much money to encourage new technologies designed to keep food fresher for a longer time. One of those already attracting interest is a ready-to-eat sandwich that will stay edible after seven years!
The technique is to expose the product to a safe level of radiation using gamma rays. Irradiation kills bacteria, like salmonella and E. coli, and also prevents vegetables from sprouting, hence augmenting an extended fresh-look appearance of the produce. The other is by pulsed electric field technology which subjects fresh foods to bursts of high-voltage electricity.
Directions. Write T if the statement is TRUE and F, if FALSE.
1. Bursts of high-voltage electricity kill bacteria such as E. coli and salmonella.
2. It is possible for food scientists to copy the flavor of natural foods.
3. The shelf-life of food refers to the price of the product indicated on the shelf
4. The other name that scientists give to artificial flavor components is nature identical chemicals.
5. Givaudan has produced 300 synthetic flavors for a real banana.
6. Bacteria like salmonella and E. coli extend the shelf-life of food.
7. Food manufacturers want to extend food freshness to serve consumers and to raise profits.
8. Pulsed electric field technology gives food a fresher look even for a long time.
9. All synthetic flavors are natural.
10. Irradiation exposes a product to an acceptable level of gamma ray radiation.
11. A banana has 200 natural food flavors.
12. A Swiss firm called Givaudan supplies the world with irradiated food.
13. Fresh foods exposed to bursts of high-voltage electricity stay fresh longer14. Food companies spend much for researches that look for ways to make food last longer.
15. Dr. Heinz Menzi is the vice president of Zurich
Answers
The validity of the statements are as follows:
1. True
2. True
3. False
4. True
5. False
6. False
7. True
8. True
9. False
10. True
11. False
12. False
13. True
14. True
15. False
Food scientists are using techniques such as irradiation and pulsed electric field technology to extend the shelf-life of food, while artificial flavors can be created to mimic the taste of natural foods, as done by Givaudan, the world's largest flavorings manufacturer.
Here are the correct responses to the statements:
1. True: Bursts of high-voltage electricity can kill bacteria such as E. coli and salmonella.
2. True: Food scientists can copy the flavor of natural foods using artificial alternatives.
3. False: The shelf-life of food refers to how long the product can be stored before it becomes unfit for consumption, not the price.
4. True: Scientists refer to artificial flavor components as "nature identical chemicals."
5. False: The statement mentions that Givaudan has produced 200 synthetic flavors for strawberry, not 300 flavors for a real banana.
6. False: Bacteria like salmonella and E. coli are harmful and can cause food spoilage, so they do not extend the shelf-life of food.
7. True: Food manufacturers aim to extend food freshness to serve consumers and increase profits.
8. True: Pulsed electric field technology can give food a fresher appearance even for an extended period.
9. False: Synthetic flavors are not inherently natural; they are artificial.
10. True: Irradiation involves exposing a product to an acceptable level of gamma ray radiation.
11. False: A real banana has 225 natural flavor components, not 200.
12. False: The Swiss firm Givaudan is the world's biggest flavorings manufacturer but does not exclusively supply irradiated food.
13. True: Fresh foods exposed to bursts of high-voltage electricity can stay fresh longer.
14. True: Food companies invest significant funds in research to find ways to prolong the shelf-life of food.
15. False: The name of the vice president mentioned is Dr. Heini Menzi, not Dr. Heinz Menzi. The location mentioned is outside Zurich, not specifically in Zurich.
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You are going to carry out a chemical reaction in which you need 16 g of oxygen for every 7.0 g of
nitrogen that will be used. If you have 0.554 kg of oxygen, how many milligrams of nitrogen do you
need?
Answers
Answer: To solve this problem, we can use the given information to set up a proportion. The ratio of oxygen to nitrogen in the reaction is 16 g : 7.0 g, or 8 : 3.5. We can set up a proportion using these ratios as follows:
(3.5) x = (8) 0.554 kg
We can solve this proportion by cross multiplying to find the value of x, which is the amount of nitrogen needed:
3.5 * 0.554 kg = 8 * x
1.947 kg = 8 * x
x = 0.24125 kg
We can convert this value to milligrams by multiplying it by 1,000,000:
x = 0.24125 kg * 1,000,000 mg/kg
= 241,250 mg
Therefore, the amount of nitrogen needed for the chemical reaction is approximately 241,250 milligrams.
The pressure of a mixture within a rigid container of nitrogen, carbon dioxide and oxygen is 150 kPa. What
is the partial pressure of oxygen if the partial pressures of nitrogen and carbon dioxide are 100 kPa and 24
kPa, respectively?
Answers
Answer:
P(O₂) = 26KPa
Explanation:
Given data:
Total pressure = 150 KPa
Partial pressure of nitrogen = 100 KPa
Partial pressure of carbon dioxide = 24 KPa
Partial pressure of oxygen = ?
Solution:
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P (total) = P(O₂) + P(N₂) + P(CO₂)
150 KPa = P(O₂) + 100 KPa + 24 KPa
150 KPa = P(O₂) + 124 KPa
P(O₂) = 150 KPa - 124 KPa
P(O₂) = 26KPa
PLEASE HELP!! The graph below shows the motion of a car leaving the airport with segments A, B, and C labeled on their journey.
Identify the line segment that would represent a negative acceleration. Explain your answer.
Answers
Answer: Segment B
Explanation:
On a graph, a line traveling upwards from left to right is considered positive. A line traveling downwards from left to right is considered negative. A line neither traveling upwards or downwards is neutral. Based on this, we can see that segment B is traveling downwards, so it would represent a negative acceleration.
what concentration (in moles per liter) of ag ions is required for the formation of a precipitate in 1.0 x 10-5 m nacl(aq)? the ksp of agcl is 1.7x10-10
Answers
A concentration of at least 1.7 x 10⁻⁵ M of Ag⁺ ions is required for the formation of a precipitate in 1.0 x 10⁻⁵ M NaCl solution.
Concentration refers to the amount of solute dissolved in a solvent, typically expressed in units of moles per liter (M).
The solubility product expression for AgCl is;
Ksp = [Ag⁺][Cl⁻]
We can assume that the concentration of Cl⁻ ions is equal to the initial concentration of NaCl, which is 1.0 x 10⁻⁵ M.
Therefore, we will rearrange the equation to solve for [Ag⁺];
[Ag⁺] = Ksp / [Cl⁻]
= (1.7 x 10⁻¹⁰) / (1.0 x 10⁻⁵)
= 1.7 x 10⁻⁵ M
Therefore, the concentration of silver ions is 1.7 x 10⁻⁵ M required.
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both ammonia and methane are covalent bonds yet the boiling point of ammonia is much higher that that of methane. what might account for this large difference.
Answers
The higher boiling point of ammonia compared to methane can be attributed to the presence of hydrogen bonding between ammonia molecules, while methane relies on weaker van der Waals forces.
Ammonia has a higher boiling point than methane primarily because it can form hydrogen bonds, while methane cannot. Hydrogen bonding is a strong intermolecular force that occurs between molecules containing hydrogen atoms bonded to highly electronegative atoms such as nitrogen, oxygen, or fluorine. In the case of ammonia, the nitrogen atom can form hydrogen bonds with other ammonia molecules.
Methane, on the other hand, consists of carbon atoms bonded to hydrogen atoms. It does not have electronegative atoms directly bonded to hydrogen, which means it cannot form hydrogen bonds. Instead, methane molecules exhibit weaker intermolecular forces known as van der Waals forces or London dispersion forces. These forces are relatively weaker compared to hydrogen bonding.
The presence of hydrogen bonding in ammonia leads to stronger attractions between its molecules, requiring more energy to overcome these intermolecular forces and transition from the liquid to the gaseous state (boiling point). The stronger intermolecular forces result in a higher boiling point for ammonia compared to methane, which only experiences weaker London dispersion forces.
Additionally, the molecular shape and size of ammonia and methane also contribute to the difference in boiling points. Ammonia molecules are trigonal pyramidal, with a bent structure and a lone pair of electrons on the nitrogen atom. This arrangement allows for stronger dipole-dipole interactions and hydrogen bonding. In contrast, methane molecules are tetrahedral in shape, with no polar bonds or lone pairs, resulting in weaker intermolecular forces.
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