A common carboxylic acid used in cooking is acetic acid, it can be found in vinegar, and some salad dressings and barbeque sauces. acetic acid is its common name, if it's composed of two carbons, what's its iupac name?


a)

formaldehyde

b)

acetic acid

c)

ethanoic acid

d)

propanoic acid

The percent by weight of acetic acid in the vinegar is  3.27% for the given 5.54-g sample of vinegar was neutralized by 30.10 ml of 0.100 m NaOH.

Vinegar is a solution of acetic acid, HC₂H₃O₂, dissolved in water. A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH. Find the percentage of acetic acid by weight in vinegar. As per the question, vinegar is a solution of acetic acid, HC₂H₃O₂, dissolved in water.

A 5.54-g sample of vinegar was neutralized by 30.10 mL of 0.100 M NaOH.

Since NaOH and HC₂H₃O₂ reacts in a 1:1 molar ratio, moles of NaOH used = moles of HC₂H₃O₂ in vinegar

So,0.100 mol/L solution of NaOH = 0.100 mol/L solution of HC₂H₃O₂ in vinegar (as they react in 1:1 ratio).

Also, Volume of NaOH = 30.10 mL = 30.10/1000 = 0.0301L

Thus, Amount of HC₂H₃O₂ in vinegar = 0.100 mol/L × 0.0301 L = 0.00301 mol.

Molar mass of HC₂H₃O₂ = 60.05 g/mol.

Weight of HC₂H₃O₂ in 5.54 g vinegar = 0.00301 mol × 60.05 g/mol = 0.18086 g.

Percentage by weight of acetic acid in the vinegar = 0.18086 / 5.54 × 100 = 3.27%.

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Starting with 100 molecules of the first limiting reagent, the maximum number of product molecules that can be formed at the end of the final reaction, given the yields of each reaction, is 11 molecules.

Let's call the starting number of molecules of the first limiting reagent "A". Then, the number of molecules of each reactant and product after each reaction can be represented as follows,

Reaction 1: A → B (80% yield)

Starting molecules of A = 100

Molecules of B produced = 80

Reaction 2: B → C (90% yield)

Starting molecules of B = 80

Molecules of C produced = 72

Reaction 3: C → D (65% yield)

Starting molecules of C = 72

Molecules of D produced = 46.8 (rounded to 47)

Reaction 4: D → E (76% yield)

Starting molecules of D = 47

Molecules of E produced = 35.72 (rounded to 36)

Reaction 5: E → F (30% yield)

Starting molecules of E = 36

Molecules of F produced = 10.8 (rounded to 11)

Therefore, the maximum number of product molecules that can be formed at the end of the final reaction is 11, rounded to the nearest whole number.

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The correct isotope of Beryllium that is undergoing alpha decay is Beryllium-9.  Therefore, the answer is B. Be 9.

The equation below represents a nuclear decay reaction:

Be + α ⟶ C + He In the equation, Be is Beryllium, and α represents an alpha particle, which is made up of two protons and two neutrons. When an alpha particle is ejected from an atomic nucleus, the atomic mass decreases by four, and the atomic number decreases by two.

According to the balanced nuclear reaction equation, Be is undergoing alpha decay because it has a mass number of 9, which is less than the sum of the masses of its daughter products. Thus, the correct isotope of Beryllium that is undergoing alpha decay is Be-9. Therefore, the answer is B. Be 9.

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Answer:

B

Explanation:

They go into a state of dormancy like hibernation .

In this stage they do

The brightness of a glow stick is not directly correlated with the reaction rate of the chemicals inside the stick. Glow sticks operate based on a chemical reaction called chemiluminescence.

This reaction involves the mixing of two chemicals, usually hydrogen peroxide and a phenyl oxalate ester, with a fluorescent dye. When these chemicals mix, they react and release energy in the form of light without producing heat. The brightness of the glow stick is determined by the amount of light produced by the reaction.

The reaction rate of the chemicals inside the glow stick is affected by various factors such as temperature, concentration, and the presence of a catalyst. The reaction rate determines how quickly the chemicals react and produce light.

However, the brightness of the glow stick is not necessarily directly related to the reaction rate of the chemicals. The brightness can also be influenced by other factors such as the type and concentration of fluorescent dye used in the stick. Some dyes produce more intense colors and therefore a brighter glow, while others produce less intense colors and a dimmer glow.

In summary, while the brightness of a glow stick is a result of the chemiluminescent reaction occurring inside it, it is not directly correlated with the reaction rate of the chemicals. Other factors, such as the type and concentration of fluorescent dye used in the stick, can also influence the brightness of the glow stick.

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The energy of one quantum of orange light, given that it has a frequency of 4.8×10¹⁴ s⁻¹ is 3.18×10⁻¹⁹ J

We know that energy and frequency are related according to the following equation:

Energy (E) = Planck's constant (h) × frequency (f)

E = hf

Using the above formula, we can obtain the energy of one quantum of the orange light. Details below:

Energy (E) = Planck's constant (h) × frequency (f)

E = hf

E = 6.626×10⁻³⁴ × 4.8×10¹⁴

E = 3.18×10⁻¹⁹ J

Thus, the energy is 3.18×10⁻¹⁹ J

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Carbon dioxide is in a solid state at -40°C.

This refers to a graph that shows the limiting conditions for the three phases (solid, liquid, and gaseous phases) of a single substance or of a mixture of substances while undergoing changes in pressure and temperature or when combined with other variables, such as solubility and temperature.

The phase diagram for CO₂ shows that at temperatures below -109.3°F (-78.5°C) and pressures below 5.1 atm, CO₂ exists as a solid (dry ice). At temperatures above -109.3°F and pressures above 5.1 atm, CO₂ is a supercritical fluid.

Hence, at -40°C, CO₂ is in a solid state.

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The weight percent of copper in bornite is approximately 63.316%.

The weight percent of copper (Cu) in bornite (Cu5FeS4) can be calculated by considering the atomic masses of copper (Cu), iron (Fe), and sulfur (S) and using the formula:

\(\[\text{{Weight percent of Cu}} = \frac{{\text{{Atomic mass of Cu}} \times \text{{Number of Cu atoms}}}}{{\text{{Formula mass of Cu5FeS4}}}} \times 100\%\]\)

Given that the atomic mass of Cu is 63.546 g/mol, the atomic mass of Fe is 55.845 g/mol, the atomic mass of S is 32.065 g/mol, and the formula mass of Cu5FeS4 is 501.849 g/mol, we can substitute these values into the formula:

\(\[\text{{Weight percent of Cu}} = \frac{{5 \times 63.546}}{{501.849}} \times 100\%\]\)

Simplifying the calculation gives:

\(\[\text{{Weight percent of Cu}} = 63.316\%\]\)

Therefore, the weight percent of copper in bornite is approximately 63.316%.

To calculate the gross value of the mining operation, we multiply the weight of the ore body (20,000,000 tons) by the cost per ton ($85):

\(\[\text{{Gross value}} = \text{{Weight of ore body}} \times \text{{Cost per ton}}\]\)

\(\[\text{{Gross value}} = 20,000,000 \times 85 = \$1,700,000,000\]\)

The expenses for the mining operation can be calculated by multiplying the weight of the ore body (20,000,000 tons) by the cost per ton ($85):

\(\[\text{{Expenses}} = \text{{Weight of ore body}} \times \text{{Cost per ton}}\]\)

\(\[\text{{Expenses}} = 20,000,000 \times 85 = \$1,700,000,000\]\)

The net value (profit or loss) of the mining operation can be obtained by subtracting the expenses from the gross value:

\(\[\text{{Net value}} = \text{{Gross value}} - \text{{Expenses}}\]\)\(\[\text{{Net value}} = \$1,700,000,000 - \$1,700,000,000 = \$0\]\)

Therefore, the net value of this mining operation is zero, indicating that there is neither profit nor loss.

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Answer:

+91.7 KJmol-1

Explanation:

Recall that ∆G= -RTlnK

Since ∆G in this case is ∆Grxn and K is the Ksp

Note that the Ksp is the solubility product (as shown by the reaction equation)

∆Grxn is the change in free energy for the reaction, in this case the ionization of the silver iodide into silver and iodide ions.

R= 8.314JK-1 and T =25°C +273 = 298 K (the centigrade temperature must be appropriately converted to its corresponding absolute absolute before proceeding with the calculation)

Hence we can substitute values accordingly;

∆Grxn = -(8.314 × 298 × ln 8.3×10^-17)

∆Grxn = +91.7 KJmol-1

Answer:

The estimated density of a table tennis ball is around 2.7 g/cm^3. The estimated density of a golf ball is around 1.5 g/cm^3.

Explanation:

The pure form of an atom present in a sample is called the element. No, elements are not always the product of the decomposition reaction.

Decomposition is a chemical reaction in which the compound or the molecule breaks to produce two or more products. The general reaction can be given as,

\(\rm XY \rightarrow X+ Y\)

And,

\(\rm compound \rightarrow element + element\)

The splitting of metal hydroxide into the water and metal oxide is an example of a decomposition reaction. Elements can be found in the free state.

Therefore, the statement is incorrect.

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Answer:

Explanation:

As per the question, the most rational claim that the student can make about the aluminum metal is that 'it could be stretched into a thin wire' without breaking which shows its ductility. It is one of the most significant characteristics of a metal. Metals can conduct electricity in any state and not only when melted. Thus, option A is wrong. Options C and D are incorrect as metals neither have the same shape always nor do they break on hitting with a hammer. Therefore, option E is the correct answer.

Answer:

Yes, the other person is correct; the answer is E. It could be stretched into a thin wire.

Explanation:

Here is why it is NOT B:

"A briskly burning wood fire is plenty hot enough to melt aluminum. If it's just smoldering (like a lot of campfires) it won't create enough heat to melt aluminum."

Therefore, CAMPFIRES are not likely to melt aluminum if it is thrown in. Aluminum's melting point is 1,221 ° F. Typical campfires are about 900 ° F.

You're Welcome

~Kicho [nm68]

The concentration of the original acetic acid solution is 0.0933 mol/L.

To find the concentration of the original acetic acid solution, we can use the following equation:

moles of acid = moles of base

First, we need to find the moles of NaOH used in the titration:

moles of NaOH = Molarity of NaOH x Volume of NaOH used (in liters)
moles of NaOH = 0.125 mol/L x 0.02240 L
moles of NaOH = 0.00280 mol

Since acetic acid is a monoprotic acid, it reacts with one mole of NaOH to form one mole of water and one mole of sodium acetate (NaC₂H₃O₂). Therefore, the moles of acetic acid in the original solution can be calculated as:

moles of acetic acid = moles of NaOH used

moles of acetic acid = 0.00280 mol

Now we can calculate the concentration of the original acetic acid solution using the formula:

Molarity of acid = moles of acid / volume of acid solution used (in liters)

The volume of acid solution used is the sum of the volume of acetic acid solution and the volume of water added to it:

Volume of acid solution used = 15.00 mL + 15.00 mL = 0.0300 L

Substituting the values, we get:

Molarity of acetic acid = 0.00280 mol / 0.0300 L

Molarity of acetic acid = 0.0933 mol/L

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Answer:

Explanation:

1. If you measure the value of Hydronium concentration is 3.0x10-3 M/L, the solution can be predicted to be acidic. This is because the concentration of hydronium ions, H3O+, is greater than the concentration of hydroxide ions, OH-. The pH value of an acidic solution is less than 7. Since hydronium ions are present in a high concentration, the pH value of the solution will be less than 7.

2. If you measure the number of Hydronium ions is 3.0x1012, the solution can be predicted to be acidic. This is because the concentration of hydronium ions is greater than 1.0 x 10^-7 M/L. The pH value of an acidic solution is less than 7.

3. If you measure the number of Hydroxide ions is 3.0x10-2 moles, the solution can be predicted to be basic. This is because the concentration of hydroxide ions is greater than 1.0 x 10^-7 M/L. The pH value of a basic solution is greater than 7. Hence, if the number of hydroxide ions is greater than 1.0 x 10^-7 M/L, the solution will be basic.

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Molecules with functional groups are more reactive as they are polar in nature.

They have higher boiling points and melting points because the interactions among the polar groups causes them to be strongly together  and hence higher energy is required to break the bonds. They are also soluble in water because of hydrogen bonding between the polar bonds of molecules and water.

These can all be easily remembered as the carboxylic acids which have acid functional group and they have higher melting, boiling points. They are also soluble in water and are more reactive than hydrocarbons of same weight. A primary alcohol has hydroxy group attached to primary carbon i.e. the carbon attached to only one carbon. All the options have primary alcohols.

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Answer:

Copper (II) acetate, which is also referred to as cupric acetate

Explanation:

Explanation:

The atomic model is a scientific theory that describes the structure and behavior of atoms. In the early 20th century, scientists began to develop new models of the atom as they discovered more about its properties. One of the earliest models was proposed by J.J. Thomson in 1897, which suggested that the atom was a sphere of positive charge with negatively charged electrons embedded within it. This model was later replaced by the Rutherford model in 1911, which showed that the atom had a small, dense nucleus surrounded by orbiting electrons. The modern quantum mechanical model of the atom, which is widely accepted today, uses complex mathematical equations to describe the behavior of electrons within atoms. To create an accurate model, scientists must use experimental data, such as the energy levels of electrons, the wavelengths of light emitted by atoms, and the positions of spectral lines, to calculate the probabilities of where electrons are likely to be found within the atom. The resulting model allows scientists to make predictions about how atoms will behave under different conditions, and it has many practical applications in fields such as chemistry, physics, and engineering.

Answer:

Atomic models are representations of the structure of an atom. They are important tools in understanding the behavior of atoms and their interactions with other atoms. In creating an atomic model, scientists must first gather and analyze experimental data to determine the properties and behavior of the atoms. They then use mathematical equations and theories, such as quantum mechanics, to develop a model that accurately represents the observed behavior of the atoms. The model must take into account the position and movement of the electrons around the nucleus, as well as the various energy levels of the electrons. By studying atomic models, scientists have been able to make important discoveries about the nature of matter and the fundamental forces that govern the behavior of atoms.

Explanation:

Given the number of atoms or molecules, we need to use Avogadro's number, but first, let's review this concept: The number 6.02×10^(23 ) is called Avogadro's number, the number of representative particles in a mole or atom.

Remember that the symbol of tellurium is Te. Now, doing the conversion to moles we're going to obtain:

With this number, we can obtain the grams of tellurium using the molar mass that you can find in the periodic table which is 127.6 g/mol. The conversion from moles to grams will be:

So, 2.33 x 10^(23) atoms of Te are 49.38 of tellurium.

According to the reaction H₂O + H₂SO₄ → H₃O⁺ + HSO₄⁻, the molecule that is acting as an acid is H₂SO₄. Therefore, the correct answer is option A.

According to the Brønsted-Lowry theory, an acid is a substance that donates a proton (H⁺) to another substance in a chemical reaction, and a base is a substance that accepts a proton. his transfer of a proton from an acid to a base is what creates a new acid and base, forming what is called a conjugate acid-base pair. In H₂O + H₂SO₄ → H₃O⁺ + HSO₄⁻ reaction, H₂SO₄ is acting as an acid because an acid H₂SO₄ is donating a hydrogen ion to H2O, forming H3O+ and HSO4-.

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The value for the molar volume of an ideal gas at STP is very important with regard to stoichiometric calculations. The volume occupied by 176 g of C₃H₈ is 89.4 L.

The volume occupied by one mole of a substance at a given temperature and pressure is called its molar volume at that temperature and pressure. The molar volume at STP is 22.414 L.

At 0°C and 1 atm, 1 mole of any gas behaving ideally occupies a volume of 22.414 L.

The molar mass of C₃H₈ = 44.097 g/mol

The number of moles (n) is given as:

n = Given mass / Molar mass

n = 176 / 44.097 = 3.99 moles

The volume occupied = 3.99 × 22.414 = 89.43 L

Thus the volume occupied by 113 g of C₃H₈ is 89.4 L.

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Your question is incomplete, but most probably your full question was

What volume in liters at STP is occupied by 176 grams of propane, C3H₈?

Round answers to one decimal.

A saturated solution is one that contains all of the solute that may possibly dissolve in it. The greatest quantity of sodium chloride that may dissolve in 100 g of water at 20 oC is 36.0 g.

What is an illustration of a solution?

A homogenous combination of two or more components with particles smaller than 1 nm is referred to as solution. Solutions take a variety of forms, include carbonated water, sugar and salt mixtures, and others.

What exactly are solutions?

a procedure of activity for resolving an issue. a solution to with an issue explanation. more specifically: a collection of variable values that satisfy an equation. an action or a procedure that transforms a material into a solid, liquid, or gas

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The statement 'reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms' is true.

Phagocytic cells are the kind of cells that consume or destroy microorganisms by producing substances that are harmful to them, according to the study of biology.

The phagocytic cells produce oxygen and nitrogen intermediates, and these intermediates are reactive enough to bind to the chemicals in the microbe and inhibit their function. The microorganism dies when its activities are impeded to the point where it is unable to carry out the fundamental functions of life. Thus, the above statement is accurate.

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Answer:

24 hours

Explanation:

There are 24 hours in a day cause that is how long for the earth to spin on its axis

Answer:

24 hours

Explanation:

The time it takes Earth to rotate so the sun appears in the same position in the sky, known as a solar day, is 24 hours. However, the time it takes Earth to complete one full rotation on its axis with respect to distant stars is actually 23 hours 56 minutes 4.091 seconds, known as a sidereal day.

When multiplying measurements, round the answer to match the least precise measurement, which in this case is two decimal places. The area is approximately 230 cm², and the volume is approximately 570 cm³ when rounded to two significant figures.

When performing multiplication with measurements, it is important to consider the rules for rounding the final answer.

The general rule for rounding is to match the least precise measurement used in the calculation.

In this case, the measurements provided for the length, width, and height of the rectangular block are given to two decimal places.

For multiplication, the rule is to round the final answer to the same number of significant figures as the measurement with the fewest significant figures.

In this case, the width of the block has the fewest significant figures (two), so the final answer should also be rounded to two significant figures.

Now, let's calculate the area and volume of the block using the given dimensions:

Area = Length x Width

     = 30.21 cm x 7.50 cm

     = 226.575 cm²

Since the width measurement has two significant figures, the area should be rounded to two significant figures:

Area ≈ 230 cm²

Volume = Length x Width x Height

        = 30.21 cm x 7.50 cm x 2.50 cm

        = 567.375 cm³

Again, considering the width measurement with two significant figures, the volume should be rounded to two significant figures:

Volume ≈ 570 cm³

Therefore, the area of the block is approximately 230 cm², and the volume is approximately 570 cm³ when rounded to two significant figures.

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Water - H2O; Ammonia - NH3; Hydrogen sulfide - H2S; Ethanol - C2H6O are examples of polar covalent bonds.

What is a polar covalent bond?

A polar covalent bond is a bond created by exchanging electrons between two atoms with different electronegativities.

A molecule that depends on polar covalent bonding is the water molecule, which consists of two hydrogen atoms and one oxygen. Due to the different electronegativity values of each element, the electrons are not uniformly distributed, with the oxygen atom spending more time with them than the hydrogen atoms. Because the chloride ion is more electronegative than the hydrogen ion, HCl is a polar covalent molecule. Therefore, hydrogen has a partial positive character, whereas the chloride ion has a partial negative character. Given that the hydrogen and chlorine atoms share electrons, HCl exhibits covalent behavior.

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Blue = orange/yellow light (wavelengths around 450-500 nm) is absorbed by the solution that appears blue.

Red = green light (wavelengths around 550-600 nm) is absorbed by the solution that appears red.

Orange = blue light (wavelengths around 450-500 nm) is absorbed by the solution that appears orange.

Green = red light (wavelengths around 650-700 nm) is absorbed by the solution that appears green.

Give a short note on absorption.

Color absorption takes place because substances selectively absorb certain wavelengths of visible light, while transmitting or reflecting others. The color that we perceive is the result of the wavelengths of light that are not absorbed, but rather transmitted or reflected, and detected by our eyes. This phenomenon is commonly used in colorimetric analysis and can provide important information about the electronic structure and composition of a substance.

Hence, the answer is,

Blue = orange/yellow light

Red = green light

Orange = blue light

Green = red light

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Elements in group 7a, also known as the halogens, contain 7 valence electrons in their outermost energy level. This includes elements such as fluorine, chlorine, bromine, and iodine. These elements are highly reactive and tend to gain one electron to achieve a stable octet configuration, forming negatively charged ions.

In contrast, elements in group 7b, also known as the chalcogens, contain 6 valence electrons in their outermost energy level. This includes elements such as oxygen, sulfur, and selenium. These elements also tend to gain two electrons to achieve a stable octet configuration, forming negatively charged ions.

The valence level of an  determines its reactivity and chemical behavior. Understanding the number of valence electrons in an element can help predict its behavior in chemical reactions and interactions with other elements. In the periodic table, elements in Group 7A (also known as Group 17) are called halogens.

These elements have 7 electrons in their valence level, resulting in a strong tendency to gain one electron to achieve a stable octet. Group 7B (also known as Group 7) refers to the transition metals, which include manganese (Mn), technetium (Tc), and rhenium (Re). Their valence electron count varies due to their ability to form multiple oxidation states. However, typically, Group 7B elements have 1 or 2 electrons in the d-subshell of their valence level, in addition to the 2 electrons in the s-subshell.

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Electronegativity refers to the measure of the tendency of an atom to pull electrons toward itself when bonded with another atom. Electronegativity is a fundamental concept in chemistry since it enables the prediction of how electrons are shared among atoms in chemical bonding, which ultimately determines the physical and chemical properties of molecules.

Therefore, to list elements in order of decreasing electronegativity, it is essential to know the periodic trend of electronegativity. The elements' electronegativity usually decreases down the group and increases from left to right across the period.Therefore, the order of decreasing electronegativity can be obtained by arranging the elements from top to bottom and from left to right according to their electronegativity. The following is the list of elements arranged in order of decreasing electronegativity:Sulfur (S) > Chlorine (Cl) > Oxygen (O) > Nitrogen (N) > Carbon (C) > Hydrogen (H)Note that electronegativity is necessary for chemical reactions, and it also determines the types of bonds formed between atoms. It is important to understand that this table provides the order of decreasing electronegativity. It is also essential to know that the elements are not arranged in this order in the periodic table.To conclude, understanding the order of decreasing electronegativity is important in predicting how electrons are shared among atoms in chemical bonding, which ultimately determines the physical and chemical properties of molecules.

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Hi there!..

Your answer↓

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\( \dag \boxed{\red{\sf{Ca(OH) {}^{2} +cl {}^{2} →CaOCl {}^{2} +H {}^{2} O}}}\)