The concentration of an aqueous solution of a nonvolatile, monoprotic acid is measured first by freezing point depression and then by boiling point elevation. The solution is found to be 0.93 m by freezing point depression and to be 0.82 m by boiling point elevation. Which is the best explanation for this discrepancy?

a. Ionization of the acid is markedly exothermic

b. The solute associates partially into dimers at lower temperatures

c. The volume of the solution is at higher temperature

d. The boiling point elevation constant for water is smaller than its freezing point depression constant.

Answer:

Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds. From these clouds, the oceans formed and the oceans absorbed a lot of the carbon dioxide in the atmosphere.

Explanation:

Answer:

For a: The balanced equation is \(2S(s)+3O_2(g)\rightarrow 2SO_3(g)\)

For c: The balanced equation is \(2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)\)

Explanation:

A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.

The given unbalanced equation follows:

\(S(s)+O_2(g)\rightarrow SO_3(g)\)

To balance the equation, we must balance the atoms by adding 2 infront of both \(S(s)\) and \(SO_3\) and 3 in front of \(O_2\)

For the balanced chemical equation:

\(2S(s)+3O_2(g)\rightarrow 2SO_3(g)\)

The given balanced equation follows:

\(2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3(s)\)

The given equation is already balanced.

The given unbalanced equation follows:

\(2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+H_2O(l)\)

To balance the equation, we must balance the atoms by adding 2 infront of \(H_2O(l)\)

For the balanced chemical equation:

\(2NaOH(s)+H_2SO_4(aq)\rightarrow Na_2SO_4(aq)+2H_2O(l)\)

The given balanced equation follows:

\(C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)\)

The given equation is already balanced.

The chemical equation of the production of ammonia is shown in figure 1 and it shows that the mole ratio for ammonia and nitrogen gas is 2:1.

What is mole ratio?

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The ratio of the volume and temperature of the gas in the given table is as follows:

Charles's law, also known as the law of volumes, describes the relationship between the volume and temperature of a gas at a constant pressure. According to this law, the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin) when the pressure is constant.

In other words, as the temperature of a gas increases, its volume will also increase proportionally, and vice versa. Mathematically, Charles's law can be expressed as:

V/T = k

where V is the volume of the gas, T is its temperature in Kelvin, and k is a constant of proportionality.

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Answer:

A

Explanation:

Answer:

carbon dioxide produced, or carbon monoxide, soot produced and Soot can cause breathing problems and it blackens buildings.

Explanation:

During complete combustion carbon and hydrogen combine with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). During incomplete combustion part of the carbon is not completely oxidized producing soot or carbon monoxide (CO).

Hydrogen bonding can explain the interactions observed in OCH4 molecules in the liquid phase, the higher boiling point of HF compared to HCl, the solid structure of ice with alternating H-O interactions, and the neutralization of HF by NaOH.

However, hydrogen bonding cannot explain the higher boiling point of H2Te compared to H2S.

Hydrogen bonding is a special type of intermolecular force that occurs when a hydrogen atom is bonded to a highly electronegative atom (such as oxygen, nitrogen, or fluorine) and is attracted to another electronegative atom nearby. It results in stronger interactions between molecules, leading to unique properties.

OCH4 molecules interact more closely in the liquid phase than in the gas phase. This can be explained by hydrogen bonding. The oxygen atom in OCH4 can act as a hydrogen bond acceptor, and the hydrogen atoms can act as hydrogen bond donors, forming hydrogen bonds with neighboring molecules.

HF has a higher boiling point than HCl. This can also be explained by hydrogen bonding. HF molecules can form stronger hydrogen bonds compared to the weaker dipole-dipole interactions in HCl, resulting in higher intermolecular forces and a higher boiling point.

Ice (H2O) has a solid structure with alternating H-O interactions. Hydrogen bonding plays a crucial role in the solid structure of ice. Each water molecule can form hydrogen bonds with four neighboring water molecules, leading to a stable and organized lattice structure.

HF is a weak acid neutralized by NaOH. The neutralization of HF by NaOH involves the formation of hydrogen bonds. The hydrogen atom in HF can form a hydrogen bond with the hydroxide ion (OH-) from NaOH, resulting in the formation of water (H2O) and a sodium fluoride (NaF) salt.

H2Te has a higher boiling point than H2S. This cannot be explained by hydrogen bonding. Although both H2Te and H2S can exhibit dipole-dipole interactions, hydrogen bonding is stronger and only occurs between hydrogen and highly electronegative atoms like oxygen, nitrogen, or fluorine. Therefore, the higher boiling point of H2Te compared to H2S is not due to hydrogen bonding.

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Answer:

I think the answer is B

Explanation:

mark me brainiest if I am right

The ability to absorb infrared radiation is a characteristic of some atmospheric gases. The two main gases in the atmosphere, oxygen and nitrogen, do not have this property. The structural feature in a molecule necessary for a gas to absorb IR radiation is: a net change in dipole moment due to the vibration or rotation of the molecule. This is known as the absorption of IR energy when infrared light hits a molecule such as carbon dioxide and the bonds bend or vibrate.

IR radiation is the infrared radiation. In the electromagnetic spectrum, its value ranges from  700 nanometers to 1 millimeter. The waves are longer than that of visible light and shorter than the radio waves. The waves are not visible to the human eye.

Dipole moment is a vector quantity. It is equal to the charge of the molecules multiplied by the distance between the two charges. In a dipole there is a positive charge at one end and a negative at the other. The direction is considered from negative to positive.

Absorption of infrared radiation requires that the dipole moment of the molecule change due to the motion of the molecule. This requirement is met by all molecules with three or more atoms, all of which are IR absorbers. Molecules with a small energy gap between their vibrational and rotational states typically absorb infrared radiation. A net change in the dipole moment of a molecule as it vibrates or rotates is a prerequisite for IR absorption.

Infrared (IR) energy is absorbed by carbon dioxide (CO2) molecules.

Infrared radiation emitted by the Earth's surface is captured by greenhouse gases such as water vapor, carbon dioxide, methane, and nitrous oxide.

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The molar mass of the unknown gas is approximately 127.13 g/mol.

To determine the molar mass of the unknown gas, we can use Graham's law of effusion. This law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass. In other words:

(rate of gas 1 / rate of gas 2) = sqrt(molar mass of gas 2 / molar mass of gas 1)

We can rearrange this equation to solve for the molar mass of the unknown gas:

molar mass of gas 2 = (rate of gas 2 / rate of gas 1)^2 * molar mass of gas 1

Plugging in the given values:

molar mass of gas 2 = (8.66 × 10^-3 moles per minute / 2.18 × 10^-2 moles per minute)^2 * (20.18 g/mol)

(Note: the molar mass of neon is 20.18 g/mol)

Simplifying:

molar mass of gas 2 = 0.150 * 20.18 g/mol

molar mass of gas 2 = 3.03 g/mol

Therefore, the molar mass of the unknown gas is approximately 3.03 g/mol. This is a long answer that involves calculating the molar mass using Graham's law of effusion, and includes the given rates of effusion, the molar mass of neon, and the formula for calculating molar mass using effusion rates.
we can use Graham's Law of Effusion to determine the molar mass of the unknown gas. Graham's Law states:

(rate of effusion of gas 1) / (rate of effusion of gas 2) = √(molar mass of gas 2 / molar mass of gas 1)

For neon gas, the molar mass is 20.18 g/mol. Plugging in the given effusion rates, we get:

(2.18 × 10^-2 moles/min) / (8.66 × 10^-3 moles/min) = √(molar mass of unknown gas / 20.18 g/mol)

Solve for the molar mass of the unknown gas:

(2.18 × 10^-2) / (8.66 × 10^-3) = 2.51

2.51 = √(molar mass of unknown gas / 20.18)

Square both sides:

2.51^2 = 6.3001 = molar mass of unknown gas / 20.18

Finally, multiply by 20.18 to find the molar mass of the unknown gas:

6.3001 * 20.18 = 127.13 g/mol

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Answer:

A.

Explanation:

Miners were happy due to the result of the gold rush. they labored very hard for very little profit. Working in the Yukon Territory was not safe. To reach it, the ground had to be dug. Then the dirt had to be removed to get the gold.

In paragraph 2, what does the phrase "miners of all shapes and sizes" mean that many people were invited. This included food, clothing, transportation equipment, etc.

Answer:

2. Ag

Explanation:

A cathode gains electrons therefore electrons are reduced. Silver (Ag) is a stronger oxidising agent than magnesium.

Answer:

Reduction:

2e- + 2k+ ➡️ 2k

2e- + pb2+ ➡️pb

2e- +2H+ ➡️H2(diatomic molecule)

Oxidation :

2cl- ➡️cl2 + 2e- (Cl is a diatomic molecule)

2O-2➡️ O2+4e- (also diatomic molecule)

2Br-➡️ Br2 + 2e- (Br is also a diatomic molecule)

I don't know if I answered ur question or not but I hope this would help

Answer:

\(V_2=1099.35mL\)

Explanation:

Hello there!

In this case, according to the given information, it is possible to infer that as both the amount of the gas and the pressure remains the same, we can solve this problem via the Charles' law a directly proportional relationship between the volume and temperature:

\(\frac{V_2}{T_2} =\frac{V_1}{T_1}\)

Thus, by solving for the final volume, V2, we obtain:

\(V_2 =\frac{V_1T_2}{T_1} \\\\V_2 =\frac{886mL*371K}{299K}\\\\V_2=1099.35mL\)

Best regards!

An illustration of the electron configuration is called orbital notation. It is highly helpful in forecasting oxidation numbers and electron pairing. An electron configuration can be written using orbital notation to give more detailed information about the electrons in an atom.

The distribution of electrons in an element's atomic orbitals is described by the element's electron configuration. The sign of a noble gas enclosed in square brackets replaces the electrical configuration of that noble gas. However, long electron configurations are frequently produced by the usual notation.

The electron configurations, and noble gas notation for the following elements are:

1. 1s²2s²2p¹, [He] 2s² 2p¹

2. 1s²2s²2p⁶3s²3p², [Ne] 3s² 3p²

3. 1 s² 2s² 2p⁶ 3s² 3p⁴, [Ne] 3s² 3p⁴

4. 1s²2s²2p⁶3s²3p⁶4s², [Ar] 4s²

5. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 5s² 5p⁵, [Kr] 4d¹⁰ 5s² 5p⁵

6. 1s² 2s²2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹, [Kr] 5s¹

7. 1 s² 2 s² 2 p⁶ 3 s² 3p⁶ 4s¹ 3d⁵, [Ar] 3d⁵ 4s¹

8. 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p¹,  [Ar]4s² 3d¹⁰4p¹

The orbital notations are given below:

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Answer:Nothing, the photon just bounces off the surface.

Explanation:

According to Albert Einstein, a photoelectron can only be emitted from a metal surface when the energy of the incident photon is greater than the work function of the metal.

In the scenario described in the question, the work function of the metal is greater than the energy of the photon. Hence, the photon just bounces off the metal surface without emitting any electron.

Answer:

The correct option is;

C) Nothing, the photon just bounces off the surface

Explanation:

The given parameters are;

The work function of the silver surface = 4.73 eV

The amount of energy of the photon = 2.5 eV

The kinetic energy, KE\(_e\) of an electron when ejected from a metal surface is given as follows;

KE\(_e\) = h·f - B·E

Where;

hf = The energy of the photon

B·E = The work function of the metal

Whereby the energy of the photon impacting on the surface of the silver is equal to or larger than the work function of the silver surface, then the energy of the photon can be reach the electrons of the silver so as to be enable the electron to be ejected through the metal surface

However, given that the energy of the photon, 2.5 eV, is less than the work function of the silver surface, 4.73 eV, the kinetic energy of an ejected electron, KE\(_e\), is less 0, therefore, no electron will be ejected form the surface of the silver and the photon just bounces off the surface.

The statement that is correct is that the sample designated as A interacted most with the substance in the column.

We define chromatography as the process that we use to separate the components of a mixture. Now the components of the mixture do interact with the chamber and the one that interacts the least would pass most through the chamber.

We can see that sample A does interact so much with the chamber thus only a little part of it can be able to pass through while sample B does not so much interact with the chamber so a lot of it is detected.

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Answer:

True

Explanation:

If you see distilled water, it's a pure substance. That means that there are only water molecules in the liquid. A mixture would be a glass of water with other things dissolved inside, like one of those powders you take if you get sick or Kool-Aid.

Answer:

Alkynes

Explanation:

Alkynes are hydrocarbons which contain carbon-carbon triple bonds. Their general formula is CnH2n-2 for molecules with one triple bond (and no rings). Alkynes undergo many of the same reactions as alkenes, but can react twice because of the presence of the two p-bonds in the triple bond.

Answer:I love to travel however I do erode aluminum so we won't be taking off on undertakings in planes at any point in the near future

Explanation:

The maximum number of grams of silver that can be produced is 44.00 g.

The given balanced chemical equation for the reaction between copper and silver nitrate is:

\(Cu + 2AgNO_3 - > 2Ag + Cu(NO_3)_2\)

To determine the maximum amount of silver that can be produced, we need first to identify the limiting reactant in the reaction. The limiting reactant is the one that is completely consumed and limits the amount of product that can be formed.

We can use the molar masses of the reactants and stoichiometry of the balanced equation to calculate the number of moles of each reactant. Then, we can compare the number of moles of each reactant to determine which is the limiting reactant.

Molar mass of Cu = 63.55 g/mol

Molar mass of AgNO3 = 169.87 g/mol

Number of moles of Cu = 34.5 g / 63.55 g/mol = 0.543 mol

Number of moles of AgNO3 = 70.2 g / 169.87 g/mol = 0.413 mol

The balanced equation shows that 1 mole of Cu reacts with 2 moles of AgNO3 to produce 2 moles of Ag. Therefore, the theoretical yield of Ag is:

Theoretical yield of Ag = 0.543 mol Cu × (2 mol Ag / 1 mol Cu) × (1 mol AgNO3 / 2 mol Ag) × (169.87 g/mol AgNO3) = 46.56 g Ag

Since the number of moles of Cu is greater than the number of moles of AgNO3, AgNO3 is the limiting reactant. Therefore, the maximum amount of silver that can be produced is:

Maximum amount of Ag = 0.413 mol AgNO3 × (2 mol Ag / 2 mol AgNO3) × (107.87 g/mol Ag) = 44.00 g Ag

Therefore, the maximum number of grams of silver that can be produced is 44.00 g.

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The primary goal of water-softening ion exchange systems is to remove calcium and magnesium from water.

Water-softening process involves ion exchange system, this process removes the chemical elements that makes water hard

The purpose of this ion exchange is to reduce calcium and magnesium content of hard water.

Thus, the primary goal of water-softening ion exchange systems is to remove calcium and magnesium from water.

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Designing a Chemical System Quick Check

1. removing magnesium and calcium from water.

2. Untreated water is subjected to high pressure, causing it to move through a semi-permeable membrane, which captures contaminants.

3. An ion exchange system would likely be chosen because it does not require specialized maintenance or regular replacement of components.

4. They are likely to choose reverse osmosis because it addresses a wider range of problems, including bacteria.

5. This treatment removes bacteria, but not other pollutants.

Answer:

You can only be able to solve two variables, k and x based on what you input as your question

k= -2x+3

x= (3-k)/2

Explanation: