Explain, in terms of the ions present, why potassium bromide must be molten during this electrolysis.
Answers
Potassium bromide must be molten during electrolysis to allow the movement of potassium (K+) and bromide (Br-) ions, which are necessary for the conduction of electricity and the subsequent chemical reactions at the electrodes.
In the electrolysis of potassium bromide (KBr), the solid compound must be turned into a molten state for the process to occur efficiently.
This is because, in a solid state, the potassium (K+) and bromide (Br-) ions are held together in a rigid crystal lattice structure, preventing them from moving freely. When KBr is molten, the ionic bonds holding the lattice together are broken, allowing the ions to move independently.
During electrolysis, an electric current is passed through the molten KBr, causing the K+ ions to migrate towards the negative electrode (cathode) and the Br- ions towards the positive electrode (anode).
At the cathode, K+ ions gain electrons and are reduced to potassium metal, while at the anode, Br- ions lose electrons and are oxidized to bromine gas. This movement and reaction of ions are only possible when KBr is in its molten state.
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Related Questions
How could a synthetic material such as Acegram affect society?
Answers
Explanation:
Synthetic fiber or synthetic fibre (in British English; see spelling differences) are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms. They are the result of extensive research by scientists to improve upon naturally occurring animal and plant fibers. In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. Synthetic fibers are created by a process known as polymerization, which involves combining monomers to make a long chain or polymer. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer). There are two types of polymerization: linear polymerization and cross-linked polymerization.
Synthetic material are madeup of monomers and long chain of monomers are known as polymers. The process is known as polymerization and the synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.
What is synthetic material?Synthetic materials are microplastic pollution and madeup up of polymers which is a long chain of polymers and the process is known as polymerization.
The synthetic materials are often converts into microplastic that takes a long period of time to decompose and they are also responsible for generation of greenhouse gases.The synthetic material which is popularly known is nylon which is very tough to recycle.
Therefore,synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.
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What is one element that is found in the human body, air, or the universe ?
Answers
Answer:
Hydrogen
Explanation:
It is pretty much present everywhere :)
When 49.4 mL of 0.721 M lead(II) nitrate reacts with 99.6 mL of 0.807 M sodium chloride, 0.830 kJ of heat is released at constant pressure. What is ΔH° (in kJ/mol) for this reaction?
Answers
When 49.4 mL of the 0.721 M lead(II) nitrate reacts with the 99.6 mL of 0.807 M the sodium chloride, 0.830 kJ of the heat is released at constant pressure. The ΔH° for this reaction is 20.81 kJ/mol.
The molarity of the NaCl = 0.807 M
The volume of NaCl = 49.4 mL
The moles = molarity × volume in L
The moles = 0.0398 mol
The molarity of the lead(II) nitrate = 0.721 M
The volume of lead(II) nitrate = 99.6 mL
The moles = molarity × volume in L
The moles = 0.0718 mol
The equation is as :
Pb(NO₃)₂(aq) + 2NaCl(aq) → PbCl₂(s) + 2NaNO₃(aq)
1 mole of the Pb(NO₃)₂ reaction with the 2 mole of the NaCl
The mole of the NaCl = 0.143 mol
The NaCl is the limiting reactant.
The heat, q = 0.830 kJ
ΔH° = q / n
ΔH° = 0.830 / 0.0398
ΔH° = 20.81 kJ/mol.
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30 grams of water was placed in a calorimeter. A 10 gram piece
of copper at 120°C was then placed in the water and the final
temperature at equilibrium was 52° What was the initial
temperature of the water in the calorimeter?
Answers
The initial temperature of the water in the calorimeter was approximately 49.912°C.
To find the initial temperature of the water in the calorimeter, we will use the heat transfer equation, which states that the heat gained by the cooler substance equals the heat lost by the warmer substance.
Q_lost = Q_gained
Here, Q represents heat transfer, and we will use the formula Q = mcΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature.
For water, the specific heat capacity (c) is 4.18 J/g°C, and for copper, it's 0.385 J/g°C.
Let's denote the initial temperature of water as Tw_initial.
For water, mass (m) is 30 grams, and ΔT = (52 - Tw_initial) °C.
For the 10 gram piece of copper, m = 10 grams, and ΔT = (120 - 52) °C.
Now, let's equate the heat lost by copper and the heat gained by water:
Q_lost (copper) = Q_gained (water)
(10 grams) × (0.385 J/g°C) × (120 - 52) °C = (30 grams) × (4.18 J/g°C) × (52 - Tw_initial) °C
3.85 J × 68 °C = 125.4 J × (52 - Tw_initial) °C
261.8 J = 125.4 J × (52 - Tw_initial)
Divide both sides by 125.4 J:
2.088 = 52 - Tw_initial
Now, add Tw_initial to both sides and subtract 2.088:
Tw_initial = 52 - 2.088
Tw_initial ≈ 49.912 °C
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George Tomlin, RMA, has been working for several years in a specialty practice. He applies for a position closer to his home with better hours and more pay. This office, however, sees patients with a variety of illnesses. For the first time since he graduated from college, he is encountering words and procedures with which he is not familiar. What is the best way for George to review his basic medical terminology? What should George do when he encounters a new word? What are some good ways for him to learn the new vocabulary for his new position?"
Answers
Answer:
George Tomlin can make some flashcards, this method really works because the human brain learns by visual cues, looking at the word to recall the definition can help train your brain for memorization.He can also record himself, simply speaking and hearing medical terminology out load can also help you learn. One simple trick is to record yourself saying these medical terms and their definitions. The act of recording them will create aural flashcards. Listening to your recording will help you remember the words when you come across them in your reading. Another good tip would be memorizing the root words. Medical terminology is based on Latin and Greek root words. Understanding the word parts will help you understand complex medical terms. Often knowing part of a word will help you figure out the meaning of the entire word. For instance, knowing the “branch” is the root for terms related to the respiratory system, makes it easier to understand that “bronchial” or “bronchitis” is also related to the lungs or breathing.
Explanation:
For George Tomlin, the best way to review the basic medical terminologies and methods is by visual as well as by auditory ways.
George can read the words carefully by going through them in books or from online resources.He can listen carefully the words in online lectures and tutorials and understand the meaning of the terminologies.When George encounters a new word :
he can look up for the meaning of the word in the medical textbooks or from any online sources.he can understand the meaning by discussing with his colleagues.the new words has its roots, abbreviations, suffixes and prefixes in a close proximity which makes the terminology easy and also provides quick reference.Some of the best ways for George to learn the new vocabulary for the new position are :
George can breakdown the words in such a way that helps him to memorize the terminology less and understand more.Learn more in details about the origin and structure of the medical terms and discuss more often with his colleagues.Learn More :
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Identify the properties of a covalent substance (multiple answers )
A) high melting point
B) low melting point
C) soluble in water
D) soluble in alcohol
E) conducts electricity in water
does not conduct electricity in water
Answers
A) high melting point
C) soluble in water
D) soluble in alcohol
E) does not conduct electricity in water
these options are a bit vague as some covalent substances dissolve in water / alcohol while some don't
How do you do this isotope worksheet? I don’t understand.
Answers
The isotope work sheet can be filled from the atomic numbers and the mass numbers of the isotopes.
How do you fill an isotope work sheet?An isotope worksheet is used to track and organize information about different isotopes of a given element. To fill an isotope worksheet, the following information should typically be included:
Element symbol: The symbol of the element being studied.
Atomic number: The number of protons in the nucleus of the atom.
Mass number: The total number of protons and neutrons in the nucleus of the atom.
Isotope: A unique identifier for each isotope, typically written as element symbol, mass number.
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The activity of a radioactive source is 15,050 mci. The half life is 72 hours. What will the activity be in Ci after 3 days? A radioactive material has 1021 atoms and an activity of 105 disintegrati
Answers
The activity of the sample after the three days based on the calculation that we have done here is 7525 Ci
What would be the activity?The duration needed for half of the radioactive atoms in a sample to undergo radioactive decay and change into a different element or isotope is known as the half-life in the context of radioactivity. In other words, half of the original radioactive material will still be present after one half-life, while the other half will have decayed. Only one-fourth of the original material will be left after two half-lives, and so forth.
The exponential decay of radioactive compounds serves as the foundation for the half-life idea. Each radioactive isotope has a unique half-life that can last anywhere from a few hundredths of a second to billions of years. It is a fixed characteristic of the isotope and is unaffected by environmental factors.
We have that;
\(A/Ao = (1/2)^t/t1/2\)
A = Activity at time t
Ao = Initial activity
t = time taken
t/12 = half life
We then have that;
\(A/15050 = (1/2)^3 * 24/72\\= A/15050 = (1/2)^1\)
A = 7525 Ci
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Which describes ways energy is transferred from one object to another?
O A. radiation, conduction, and convection
o
B. radiation, transpiration, and conversion
o
C. conversion, transpiration, and conduction
D. transmission, transpiration, and conduction
Answers
a 9.5 l container at 1.7 atm has 0.50 mol c3h6, a van der waals gas with . what is the temperature (k)?
Answers
A 9.5 l container at 1.7 atm has 0.50 mol C₃H₆ , a vander waal gas, the temperature will be 393.65 K.
The formula of ideal gas equation is
PV= nRT
where P is the pressure of the gas, V is the volume of the gas, n is the no of moles of gas, R is gas constant and T is the temperature.
Here,
P=1.7 atm
V= 9.5 l
n= 0.50 mol
Converting 1.7 atm into Kpa
P= 1.7 atm × 101.325 Kpa/1 atm
P=172.2525 KPa
Putting these values in the equation PV=nRT
172.2525 KPa × 9.5 l = 0.5 mol×8.314 l.KPa/mol.K.T
⇒1636.39875 l. KPa= 4.157 l.KPa/ K.T
⇒T= 393.6489
⇒T= 393.65 approx
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You're paid $25 per hour for your job. How much would you earn in cents per second?
Answers
Answer:
0.694 cents per second
Explanation:
25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second
is this equation balanced or unbalanced? group of answer choices the equation is unbalanced, and the correct balance would be 2c o2
Answers
The equation is unbalanced, and the correct balance would be 2CO₂.
The given equation is likely referring to the combustion of carbon monoxide gas (CO). In an unbalanced equation, the number of atoms on each side of the equation is not equal. In this case, we have one carbon atom on the left side (CO) and two oxygen atoms on the right side (O₂). This indicates an imbalance.
To balance the equation, we need to adjust the coefficients in front of the chemical formulas to ensure that the number of atoms of each element is the same on both sides. In this case, we need to balance the carbon and oxygen atoms.
By placing a coefficient of 2 in front of CO, the equation becomes 2CO. This balances the carbon atoms. However, it also introduces two oxygen atoms on the left side. To balance the oxygen, we need to add a coefficient of 2 in front of O₂. Therefore, the balanced equation is 2CO + O₂ → 2CO₂.
In the balanced equation, we have two carbon atoms, four oxygen atoms, and two oxygen molecules on both sides, ensuring that the law of conservation of mass is satisfied.
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The equation given was unbalanced. The process of balancing involves ensuring the same number of each type of atom on both sides. For example, the combustion of ethane would be balanced as 2C2H6 + 7O2 = 4CO2 + 6H2O.
Explanation:The equation you provided is indeed unbalanced. To balance an equation, you need to ensure that the number of each type of atom on the reactants side (left side of the equation) matches the number of each type of atom on the products side (right side of the equation). In this case, you have omitted the products so it's unclear what the correct balance would be, but for example for the combustion of ethane (C2H6 + O2 = CO2 + H2O) the correct balance would be 2C2H6 + 7O2 = 4CO2 + 6H2O.
Here's how you'd get there: First balance the carbon (C) atoms: since there are 2 carbons in ethane, you'd need 4 carbon dioxides (because each molecule of CO2 contains 1 carbon). Then balance the hydrogen (H) atoms: with 6 hydrogens in ethane, you'd need 6 water molecules (each containing 2 hydrogens). Now you'll find there are more oxygen (O) atoms on the product side than in your initial equation. There are 14 in total: 8 from the carbon dioxide and 6 from the water. To balance this out, adjust the number of O2 molecules (which each contain 2 oxygens) on the reactant side to 7.
Note that sometimes, as in this example, adjusting the coefficients to balance one type of atom can change the balance of another type of atom, and you may need to then rebalance the first type of atom. With practice, you'll become more efficient at finding the correct coefficients faster.
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The school bus driver has to be more careful when driving in the rain because the road is more slippery then when she drives on a sunny day. That means the friction on the road when it is raining is __________________the friction on a sunny day.
Answers
Answer:
less than
Explanation:
LAB: SOIL PARTICLES
You have learned that soil is made of weathered rock, water, air, and organic material. The size of particles is an important soil characteristic. According to the United States Department of Agriculture (USDA), there are three main particle sizes—sand, silt, and clay. Clay is particles smaller than 0.002 mm. Sand is particles larger than 0.05 mm. Particles in between are silt. The size of particles in soil determines how much water the soil will hold. Small particles hold more water than large particles.
Soil usually settles into different layers called horizons. The arrangement of horizons is the soil profile. In this experiment, you will observe how particle size affects the soil profile.
Describe how particle size affects the settling of soil.
Which type of soil do you think will settle to the bottom of the container faster?
1 1/2 cups potting soil
1 1/2 cup sand
3 wide-mouthed juice bottles with lids
Masking tape
Pen
Water
Make masking tape labels for each juice bottle. Label one "soil" and the other "soil and sand."
Fill both bottles 3/4 full of water.
Slowly pour 1 cup of soil into the water in the "soil" bottle. Observe the behavior of the soil particles.
Fill the "soil" bottle the rest of the way with water. Secure the lid tightly and shake the bottle. Put the bottle on a flat surface where nothing will disturb it.
Slowly pour 1 cup of sand into the water in the "sand" bottle. Observe the behavior of the soil particles.
Fill the "sand" bottle the rest of the way with water. Secure the lid tightly and shake the bottle. Put the bottle on a flat surface where nothing will disturb it.
Add the 1/2 cup of sand to the remaining 1/2 cup of soil. Mix thoroughly with the spoon.
Slowly pour the sand and soil mixture into the water in the "soil and sand" bottle. Observe the behavior of the particles.
Fill the "soil and sand" bottle the rest of the way with water. Secure the lid tightly and shake the bottle. Put the bottle on a flat surface where nothing will disturb it.
Leave both bottles undisturbed for 8 hours.
Look at the bottles again after 8 hours and record your observations.
Data
What did you notice about the way the soil particles sank in the water? How was it different from the way the soil and sand particles sank?
What does the soil look like in the "soil" bottle? How is it different from the soil in the "soil and sand" bottle?
In the "soil and sand" bottle, which type of soil is on the bottom? Why?
The amount of each size particle in soil is the particle size distribution. Do you think this is a good way to determine particle size distribution? Why or why not?
State whether your hypothesis was supported or disproved, and then explain why it was supported or disproved using your data. Summarize your observations and answer one or more of the following questions: How does this lab relate to what I have been learning? How does this experiment relate to things I have seen in my own life? What could be done to improve this experiment?
Heading and title
Hypothesis, procedure, data, post lab, and conclusion section headings
Each section is thorough and complete
Lab report typed into a word processor (such as Microsoft Word) and saved
Typed lab document uploaded to Ignitia and submitted
Answers
1. I noticed that the soil particles settled out of the water with the larger, heavier particles settling out first and on the bottom, and each layer has smaller and lighter particles in it.
2. Sand settled on the bottom because they are heavier and have more mass than the smaller particles such as silt and clay.
3. Yes, this is a good way to determine particle size distribution. The method used in the experiment allows for the separation of soil particles based on their size and weight, which is a good indicator of their distribution in the soil sample.
4. The results in this experiment may look different when done in different locations because the particle size distribution of soil can vary depending on the location, climate, and geology of the area. Soils in different locations may have different compositions, including different amounts of sand, silt, and clay, which can affect the results of the experiment. Additionally, the sedimentation rate of the particles can also be influenced by factors such as the temperature, the presence of organic matter, and the presence of clay minerals, which can further affect the results.
The label for baking powder identifies one of the ingredients as monocalcium phosphate. Why does this name not follow our IUPAC naming system for ionic compounds? Based on how they named it, What would the formula be? Why doesit not make any sense?
Answers
The name monocalcium phosphate does not follow the naming system of the IUPAC for ionic compounds. This is because monocalcium phosphate is not a compound that consists of ions .
The naming of the compounds under IUPAC naming standards is done by looking at the composition of the ions of the compound. Inorganic compounds are made up of ions that are held together through ionic bonds. The ions have an electrical charge which is indicated by a superscript to the right of the chemical symbol.
The reason why it does not make sense for this name to follow the IUPAC naming system is that monocalcium phosphate is not an ionic compound, it is a salt compound that consists of two different molecules. These two molecules are held together through hydrogen bonds instead of ionic bonds. Therefore, it is not named according to the IUPAC naming system.
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all of the following contain more than one hydroxyl group except
Answers
The compound that does not contain more than one hydroxyl group is acetic acid (CH3COOH).
A hydroxyl group is a functional group consisting of an oxygen atom bonded to a hydrogen atom. It is represented by the -OH formula. Hydroxyl groups are commonly found in organic compounds, such as alcohols and carboxylic acids. They are responsible for the characteristic properties and reactivity of these compounds.
When considering the given information that all of the following contain more than one hydroxyl group, we need to identify the option that does not fit this criteria. Let's analyze the options:
ethanol (C2H5OH): Ethanol contains one hydroxyl group (-OH).glycerol (C3H8O3): Glycerol contains three hydroxyl groups (-OH).glucose (C6H12O6): Glucose contains six hydroxyl groups (-OH).acetic acid (CH3COOH): Acetic acid contains one hydroxyl group (-OH).Based on the analysis, the option that does not fit the criteria of containing more than one hydroxyl group is Acetic acid (CH3COOH).
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Except for ethanol and propanol, all other substituents have more than one hydroxyl group. Therefore, the correct options are A and C.
A functional group called a hydroxyl group (-OH) is composed of an oxygen atom attached to a hydrogen atom. It can often be found in many organic substances such as alcohols, phenols and carboxylic acids. Molecules that contain a hydroxyl group acquire specific chemical and physical characteristics.
Due to its polar nature, substances containing hydroxyl groups can form hydrogen bonds with other molecules. Their solubility in water is similarly affected by this polarity. Hydroxyl groups are involved in many important biological activities, including the synthesis of carbohydrates, proteins, and nucleic acids.
Therefore, the correct options are A and C.
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Your question is incomplete, most probably the complete question is:
All of the following options contain more than one hydroxyl group except:
A. Ethanol
B. Glycerol
C. Propanol
D. Butanol
E. Sorbitol
which of the following is a weak acid?
A) H2SO4 (Sulfuric acid)
B) HCl (Hydrochloric acid)
C) CH3COOH (Acetic acid)
D) HNO3 (Nitric acid)
correct answer is C).
Answers
The volume of a gas is 22.4 L when the pressure of the atmosphere is 1.00 atm. If the pressure is increased to 1.05 atm, without changing the temperature, what is the new volume?
K = °C + 273
Question 13 options:
a)
22.4 L
b)
23.5 L
c)
25.2 L
d)
26.3 L
Answers
Answer:
b I think
explanation
they're all false tho
HNO3 + KOH → ____ + _____
Answers
Answer:
HNO3 + KOH → _KNO3___ + __H2O___
Explanation:
It's balanced
hope it helps
Atomic Mass is the ___________ of the mass numbers of all the isotopes of an element.
Answers
Answer:
Number of proton + No of electron
Explanation:
Mark me brainlist
Answer:
No of neutron + no of protons
Explanation:
Since atomic mass is the sum total of the neutron and mass number then we can say that, neutron number plus proton number is the mass number of all isotopes.
How many moles of hydrogen are produced from the reaction of 3.0 moles of zinc?
Answers
Answer:
3 moles
Explanation:
How do the 5 branches of chemistry overlap?
Answers
Answer:
Chemistry, Biology, Medicine, Physics, and Geology
Which of the following sources should be examined in a study to determine the impact of a geologic source on levels of CO2 in the atmosphere?
answer choices
Photosynthesis
cellular respiration
decomposition
volcanoes
Answers
The sοurces which shοuld be examined in a study tο determine the impact οf a geοlοgic sοurce οn levels οf CO₂ in the atmοsphere, accοrding tο the given οptiοns are Vοlcanοes.
What are geοlοgical sοurces?Geοlοgic sοurces refer tο natural prοcesses and events related tο the Earth's geοlοgical activities. These sοurces include vοlcanic eruptiοns, geοthermal activity, release οf gases frοm undergrοund reservοirs, and geοlοgical fοrmatiοns that cοntain οr release certain substances. These sοurces can cοntribute tο the release οf variοus gases, including carbοn diοxide (CO₂), intο the atmοsphere.
Therefοre, The sοurces which shοuld be examined in a study tο determine the impact οf a geοlοgic sοurce οn levels οf CO₂ in the atmοsphere are Vοlcanοes.
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Through bonding, atoms are able to attain the same electron configuration as a(n)?
Answers
The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration
What is electron configuration?The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration, also known as electronic structure or electron configuration. As follows: 1s will be filled first, with a maximum of 2 electrons, followed by 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, and 5p. The Aufbau Principle, the Pauli-Exclusion Principle, and Hund's Rule are a set of three guidelines we must adhere to while allocating electrons to orbitals. To determine the valence electrons of an atom, electron configurations assist us to understand the chemical behavior of elements. The shell number (n), kind of orbital, and superscript indicating the number of electrons in the orbital are the first three symbols used to represent the electron configuration.
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What is the temperature in Celsius of 308 K?
A. 35°C
B. -35°C
C. 581 K
D. -581°C
Answers
The temperature in Celsius of 308 K is 35°C. Option A is correct.
Temperature in Celsius (°C) is a unit of measurement used to express the amount of thermal energy or heat present in a substance or environment, relative to the freezing and boiling points of water.
In the Celsius scale, the freezing point of water is defined as 0°C, and the boiling point of water is defined as 100°C, at standard atmospheric pressure.
To convert temperature from Kelvin (K) to Celsius (°C), you subtract 273.15 from the given temperature in Kelvin.
308 K - 273.15 = 34.85°C (rounded to two decimal places)
Since the temperature 308 K is slightly less than 35°C.
Hence, A. is the correct option.
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help fast plssssssssssssssssssss
Answers
That should be the answer
A tank measures 18.89in * 8.39in* 6.70in, how many liters of dichloromethane could it hold?
Answers
Answer:
Well it would hold 1061.86357 liters.
Explanation:
So to find volume you multiply 18.89(8.39)(6.7) and you’ll get the volume.
Which of the following is a rechargable battery? Select the correct answer below: a. dry cell b. alkaline battery c. lithium ion battery d. These are all rechargable batteries.
Answers
The correct answer to your question is: c. lithium-ion battery. Lithium-ion batteries are rechargeable, making them suitable for various applications like electronics and electric vehicles. In contrast, dry cell and alkaline batteries are typically single-use and not rechargeable.
The correct answer to your question is option c. Lithium ion battery is a rechargeable battery that is commonly used in electronic devices. It is known for its high energy density, which means it can store more energy in a smaller size compared to other types of batteries. In contrast, dry cell and alkaline batteries are typically single-use and not rechargeable. This makes it popular in portable devices such as smartphones, laptops, and tablets. Lithium ion batteries typically last longer than other rechargeable batteries, making them a popular choice for consumers.
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Calculate the molarity of the two solutions. the first solution contains 0.450 mol0.450 mol of naohnaoh in 2.65 l2.65 l of solution. molarity: mm the second solution con
Answers
The molarity of the first solution is 0.1698 M, and the molarity of the second solution is 0.291 M.
To calculate the molarity of a solution, we use the formula:
Molarity (M) = moles of solute / liters of solution
Let's calculate the molarity for each solution step-by-step:
1. First solution:
Given: moles of NaOH = 0.450 mol
Volume of solution = 2.65 L
Using the formula, we have:
Molarity = 0.450 mol / 2.65 L
Molarity = 0.1698 M
Therefore, the molarity of the first solution is 0.1698 M.
2. Second solution:
Given: mass of NaCl = 13.9 g
Volume of solution = 817 mL = 0.817 L (convert mL to L)
First, we need to convert mass of NaCl to moles:
Moles = mass / molar mass
Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol (Na = 22.99 g/mol, Cl = 35.45 g/mol)
Moles = 13.9 g / 58.44 g/mol
Moles = 0.238 mol
Now, we can calculate the molarity using the formula:
Molarity = 0.238 mol / 0.817 L
Molarity = 0.291 M
Therefore, the molarity of the second solution is 0.291 M.
In summary, the molarity of the first solution is 0.1698 M, and the molarity of the second solution is 0.291 M.
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a. 1.73 m =
cm
a. 7,651.27 m =
km
Answers
Answer:
A. 1.73 m = 172 cm
B. 7,651.27 m = 7.65127 Km