In an aqueous solution of ch3br, what is the strongest intermolecular force between ch3br and water?

Answer:

To solve this problem, you need to follow these steps:

(a) To find the chemical formula of the salt, you need to determine the empirical formula of the anion and then combine it with the sodium cation. To do this, you need to calculate the moles of C, H, and O in the anion from the given masses of CO2 and H2O. Then, you need to divide the moles by the smallest value to get the simplest ratio of the elements. Finally, you need to multiply the ratio by a factor to get the whole number of atoms that matches the given molar mass of the salt.

Using this method, the calculation can be done as follows:

Moles of C in the anion = (0.942 g CO2) / (44.01 g/mol CO2) x (1 mol C / 1 mol CO2) = 0.0214 mol C

Moles of H in the anion = (0.0964 g H2O) / (18.02 g/mol H2O) x (2 mol H / 1 mol H2O) = 0.0107 mol H

Moles of O in the anion = (0.942 g CO2) / (44.01 g/mol CO2) x (2 mol O / 1 mol CO2) + (0.0964 g H2O) / (18.02 g/mol H2O) x (1 mol O / 1 mol H2O) = 0.0535 mol O

Simplest ratio of C, H, and O in the anion = (0.0214 / 0.0107) : (0.0107 / 0.0107) : (0.0535 / 0.0107) = 2 : 1 : 5

Factor to get the whole number of atoms = (112.02 g/mol) / [(2 x 12.01 g/mol) + (1 x 1.01 g/mol) + (5 x 16.00 g/mol)] = 1

Empirical formula of the anion = C2H1O5

Chemical formula of the salt = NaC2H1O5

Therefore, the answer is NaC2H1O5.

(b) To draw the Lewis structure of the anion, you need to count the total number of valence electrons, arrange the atoms around the central atom, connect them with single bonds, and distribute the remaining electrons to satisfy the octet rule. To do this, you need to know that carbon has 4 valence electrons, hydrogen has 1, and oxygen has 6. You also need to know that the salt contains carboxylate groups (CO2-), and the carbon atoms are bonded together.

Using this method, the drawing can be done as follows:

Total number of valence electrons = (2 x 4) + (1 x 1) + (5 x 6) + 1 = 40

Arrangement of atoms = C-C-O-O-O-H

Single bonds = C-C-O-O-O-H | | | |

Remaining electrons = 40 - 12 = 28

Distribution of electrons = C-C-O-O-O-H | | | | … … … … … … … …

Therefore, the Lewis structure of the anion is:

O-  O-  O

//   |   \\

C-C-O-H   ..

| | |    ..

.. .. ..

To determine the acidity or basicity of the dissolved substance, you need to identify the conjugate acid-base pairs and compare their relative strengths. To do this, you need to know that the salt is the product of a weak acid (C2H2O5) and a strong base (NaOH). You also need to know that the carboxylate groups can act as weak bases and accept protons from water, forming bicarbonate and carbonate ions. You also need to know that the given Ka values are the acid dissociation constants of the weak acid and its conjugate base.

Using this method, the analysis can be done as follows:

Conjugate acid-base pairs = C2H2O5 / C2H1O5- and C2H1O5- / C2O5(2-)

Relative strengths = C2H2O5 is a weak

Explanation:

The chemical formula for aluminum oxide based on ionic bonding from valence electrons is Al₂O₃.

The chemical formula of a compound is a symbolic representation of its chemical composition.

Chemical formulae gives information about the elements that constitute the molecules of a compound and also about the ratio in which the atoms of these elements combine to form such molecules.

In this compound, aluminum (Al) donates three electrons to oxygen (O), resulting in the formation of Al³⁺ cations and O²⁻ anions. The ionic bond is formed between these oppositely charged ions, resulting in the formula Al₂O₃.

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Answer:

1. A

2. C

Explanation:

For the first question, we know that the water transformed into a gas. This fact eliminates choices C and D, primarily because they describe the change as "gas to liquid" instead of liquid to gas.

What separates B from A is that B is saying the liquid changed to a gas in response to sunlight, which is completely false and impertinent to the prompt.

A is the correct answer.

for the second question, we know that condensation causes clouds -- and that neither evaporation nor water vapor would clear clouds to make more of them, which eliminates choices B and D. Going back to condensation, the accumulation of water vapor plays a big role in the formation of clouds. While evaporation does play a part in [it] as well, condensation is what caused the sudden appearance of clouds in the troposphere.

C is the correct answer.

Answer:

its totally d

Explanation:

Answer:

C. Atoms are arranged during chemical reactions

Explanation:

All matter is made of atoms and atoms are indivisible and indestructible. compounds are formed by a combination of two or more different kinds of atoms.

The pH of the 0.10 M HX(aq) solution is 7.00.

To find the pH of a 0.10 M HX(aq) solution, we need to calculate the concentration of hydrogen ions (H+) in the solution. The concentration of H+ in the solution can be calculated using the expression for the dissociation constant (Ka) of the weak acid:

Ka = [H+][X-] / [HX]

Where [HX] is the initial concentration of the weak acid, [H+] is the concentration of hydrogen ions produced by the dissociation of the weak acid, and [X-] is the concentration of the conjugate base.

Since HX is a weak acid, it does not dissociate completely in solution, so the initial concentration of HX can be assumed to be equal to the concentration of HX in the solution, [HX] = 0.10 M.

Rearranging the equation, we can find [H+]:

[H+] = (Ka * [HX]) / [X-]

Since [HX] = 0.10 M, and Ka = 1.0 × 10-6, we can calculate [H+]:

[H+] = (1.0 × 10-6 * 0.10) / [X-]

Since [X-] is the conjugate base of the weak acid, it will be present in low concentration, so we can assume that [X-] = [H+].

[H+] = (1.0 × 10-6 * 0.10) / [H+]

Solving for [H+], we find:

[H+] = 1.0 × 10-7 M

Finally, the pH of the solution can be calculated as:

pH = -log[H+] = -log(1.0 × 10-7) = 7.00

So, the pH of the 0.10 M HX(aq) solution is 7.00.

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Answer:

ganar tres electrones

Explanation:

Answer:

gaining three electrons

First nations people along the west coast of British Columbia used smelting technology to create copper plaques is false.

Smelting process is the form of extractive metallurgy to produce a metal from its ore. it is the process of melting and separation of charges .  it is extensive energy process. Plaques are made by pouring molten metal in to a mold. and when it gets cools , it solidified into a copper solid plaque. first nation people use copper as hunting weapons, spear tools etc. copper is metal.

Thus, First nations people along the west coast of British Columbia used smelting technology to create copper plaques is false.

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Answer:

0.60 moles of Na₂SO₄

Explanation:

Molarity is an unit of concentration defined as the ratio between moles of solute and liters of solution.

A solution of Na₂SO₄ 0.40M contains 0.40 moles of solute (Na₂SO₄) per liter of solution.

As you have 1.5L of solution, moles of Na₂SO₄:

1.5L × (0.40mol / L) = 0.60 moles of Na₂SO₄

The amount of salt in the tank as a function of time is f(t) = 70 + 4t, where f(t) is the amount of salt in the tank after t minutes.

The rate of salt entering the tank is 2 lb/gal x 2 gal/min = <<2*2=4>>4 lb/min, where the concentration of salt is 2 lb/gal. Initially, the tank contains 70 lb of salt and 280 gal of water. When the brine flows into the tank at a constant rate of 2 gal/min, the concentration of salt in the tank remains constant. When the tank is stirred, the salt will be uniformly distributed throughout the mixture. Let’s assume that t is the time in minutes. As a result, the number of minutes that the solution is in the tank will be t. Since the concentration of salt in the tank remains constant, the amount of salt in the tank after t minutes is 70 lb + 4 lb/min × t.

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From the balanced equation below the mole ratio of PCl3 to PCl5 is 1:1

\(PCl_{5} + PCl_{5}\) -------------------> \(PCl_{5}\)

Number of moles of \(PCl_{3}\) can be expressed as  1 mole

Number of moles of  \(Cl_{2}\) can be expressed as 1 mole

Number of moles of  \(PCl_{5}\) can be expressed as 1 mole

Mole ratio of \(PCl_{5}\) can be expressed as 1:1

The ratio of the mole quantities of any two compounds present in a balanced chemical reaction is known as the mole ratio. A comparison of the ratios of the molecules required to accomplish the reaction is given by the balancing chemical equation.

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Answer:

If you increase the mass at a given force the rate of acceleration slows. Therefore, mass is inversely proportional to acceleration. ... Force is directly proportional to acceleration (force ~ acceleration) As force increases acceleration increases.

acceleration slows down .

Explanation:

if we increase the mass at a given force the rate of acceleration slows

To calculate the percentage of limestone dissolved in each solution, subtract the final mass from the initial mass, divide by the initial mass, and multiply by 100.

To determine the percentage of limestone dissolved in each solution, we follow a simple formula using the initial and final mass of the limestone.

First, subtract the final mass from the initial mass to find the mass that dissolved. Then, divide this value by the initial mass to get the fraction of limestone dissolved. To express this fraction as a percentage, multiply it by 100.

The formula can be summarized as follows:

Percentage of limestone dissolved = [(Initial mass - Final mass) / Initial mass] * 100

By using this formula for each acid concentration, you can calculate the percentage of limestone dissolved in each solution. This analysis allows you to quantify the effectiveness of the acid concentration in dissolving the limestone.

Remember to consult the math review or resources on percentages if you need further assistance with the calculations.

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Answer:

Hi

Please mark brainliest ❣️

Thanks

Explanation:

Correct answer is D

Energy A

Look at this

Energy required to break bonds that is intermolecular forces

Answer:

160.32 grams of Ca or 160 if rounded

Explanation:

Multiply moles of Ca by the conversion factor (molar mass of calcium) 40.08 g Ca/ 1 mol Ca, which then allows the cancelation of moles, leaving grams of Ca.

4 mol*40.08g/mol = 160.32 grams of Ca

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Answer:

\(\boxed {\boxed {\sf 160.32 \ g, \ 160 \ g, \ or \ 200 \ g }}\)

Explanation:

To convert from grams to moles, we must use calcium's molar mass, which can be found on the Periodic Table of Elements.

Now, we can use the molar mass as a ratio or fraction.

\(\frac{40.08 \ g \ Ca}{1 \ mol \ Ca}\)

This fraction can be multiplied by the number of moles, which is 4.

\(4 \ mol \ Ca * \frac{40.08 \ g \ Ca}{1 \ mol \ Ca}\)

When we multiply, the moles of calcium will cancel each other out.

\(4* \frac{40.08 \ g \ Ca}{1}\)

Since the fraction is over 1, we can just remove the denominator and write a simply multiplication equation.

\(4* 40.08 \ g \ Ca\)

\(160.32 \ g \ Ca\)

Depending on the teacher's instructions, the answer can be left as is or rounded.

If we round to the technically correct number of significant figures, it would be 1, because the original measurement of 4 moles has 1 sig fig. This would 200 grams, but that's a large amount to round.

We could also round to the nearest whole number. The 3 in the tenth place tells us to leave the whole number as it is. This would be 160 grams.

The answer could be 160.32 grams, 160 grams, or 200 grams, depending on rounding and significant figures.

Answer: The farther away the moon is from earth the lower the tides would be.

Explanation: Because of the moons close proximity to Earth its gravity pulls up on water which causes the high and low tides, therefore if the moon is farther away its effect would be lessened.

Because of the moons close proximity to Earth its gravity pulls up on water which causes the high and low tides, therefore if the moon is farther away its effect would be lessened.

On the planet, tides rise and fall due to the moon's gravitational pull and the Earth's rotating force. The animals that are most impacted by tidal changes in coastal regions have special survival strategies.

A tide is the term used to describe the seawater's alternating approach and retreat along a shoreline. At high tide, the water reaches the shoreline to the greatest extent. When the tide recedes the most, it is at low tide.

The two primary causes of high and low tides are the Earth's rotation and the moon's gravitational pull on the planet. The Moon's pull is greatest on the side of the Earth nearest to it, and as a result, the oceans rise and high tides are produced.

Therefore,  Because of the moons close proximity to Earth its gravity pulls up on water which causes the high and low tides, therefore if the moon is farther away its effect would be lessened.

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Answer:

Color Change.

Production of an odor.

Change of Temperature.

Evolution of a gas (bubbles)

Precipitate (formation of a solid)  

There are 5 so you can choose 4.

The four signs that a chemical reaction has occurred are as follows:

A chemical reaction may be defined as a process that significantly involves the chemical transformation of one set of chemical substances to another. This process involves the utilization of substances known as reactants that are transformed into other substances known as products.

Every chemical reaction involves the four signs which are mentioned above. These signs are delivered by chemical reactions along with determined products. But the mass of the reactants and products always remains the same. Precipitation is only visualized in specific reactions with the possessions of certain characteristics.

Therefore, the four signs that a chemical reaction has occurred are well-mentioned above.

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Answer:

it gets more or less reactive

Explanation:

Answer:

Unlike protons, electrons can move from atom to atom. If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.

Explanation:

At 303 K, 56% of the SO2Cl2 in a 2.00 mol flask of SO2Cl2 dissolves into SO2 and Cl2. At this temperature of 303 K, the Kc for this reaction is 1.58.

The decomposition of SO2Cl2 to SO2 and Cl2 is a reversible reaction. The equation for the reaction is:

SO2Cl2(g) <==> SO2(g) + Cl2(g)

We know that 56% of the SO2Cl2 has decomposed, so we can assume that the equilibrium constant, Kc, is less than 1. To calculate Kc, we will use the equilibrium concentrations of the reactants and products.

We know that the initial concentration of SO2Cl2 is 2.00 mol/2.00 L = 1.00 M, and that 56% of the SO2Cl2 has decomposed, so the equilibrium concentration of SO2Cl2 is 1.00 M * 0.44 = 0.44 M

The equilibrium concentrations of SO2 and Cl2 can be calculated by assuming that they are produced in equal amounts, so the equilibrium concentration of each will be 0.56 M (0.56 mol/L)

Kc is defined as the concentration of products raised to the power of their stoichiometric coefficients, divided by the concentration of reactants raised to the power of their stoichiometric coefficients.

Kc = [SO2][Cl2] / [SO2Cl2]^2

Kc = (0.56 M)^2 / (0.44 M) = 1.58

So the Kc for this reaction at 303 K is 1.58

It's worth noting that equilibrium constant, Kc, is not a constant but a function of temperature, concentration and pressure. The value of Kc for a reaction is different at different temperatures, pressures, etc.

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Answer:

The difference between alchemy and modern chemistry is alchemy is based on a mystic, supernatural view of reality, whereas chemistry assumes reality is basically natural.

Explanation:

hope this helps!

Answer:

When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction

Explanation: i think

The correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Here, we need to find out the probability that a selected compound has an impurity given that the test indicates an impurity is present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is present

= 0.15 x 0.9 + 0.85 x 0.05

= 0.14 + 0.0425

= 0.1825P

(B|A) = probability that the test indicates an impurity is present given that the compound has impurity = 0.9

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

         = 0.9 * 0.15 / 0.1825

         = 0.7370

         ≈ 0.74

Conditional probability that the selected compound actually has an impurity is 0.74.10.

Here, we need to find out the probability that a selected compound is actually free of an impurity given that the test indicates an impurity is not present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is not present = 0.85 x 0.95 + 0.15 x 0.1 = 0.8075

P(B|A) = probability that the test indicates an impurity is not present given that the compound has impurity

          = 0.1

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

          = 0.1 * 0.15 / 0.8075

          = 0.0185

Conditional probability that the selected compound is actually free of an impurity is 0.0185.11.

Here, we need to find out the probability that the selected roll is from Process I given that it is defective.

Let A denote the event that a roll is from Process I and B denote the event that a roll is defective.

Then, we need to find out P(A|B).

P(A) = probability that a roll is from Process I = 0.6

P(B|A) = probability that a roll is defective given that it is from Process I = 0.03

P(B|A') = probability that a roll is defective given that it is from Process II = 0.01

P(A'|B) = probability that a roll is from Process II given that it is defective

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / [P(B|A) * P(A) + P(B|A') * P(A')]

= 0.03 * 0.6 / (0.03 * 0.6 + 0.01 * 0.4)

= 0.6429

≈ 0.64

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Hence, the correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

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Answer: B. Shared electrons

Explanation: Electrons are shared in covalent bonds. The other options are all properties of metallic bonds.

A one-step process would require a higher energy input and may not be as economically viable. The two-step process for producing methanol from methane and water is used because it is more thermodynamically favorable.

The first step, which produces carbon monoxide and hydrogen gas, has a positive ΔH∘ of 214.7 J/K, meaning it requires energy input. However, the second step, which produces methanol from the carbon monoxide and hydrogen gas, has a negative ΔH∘ of -332.3 J/K, meaning it releases energy. By combining these two steps, the overall ΔH∘ for the reaction is negative and energy is released, making the process more efficient. A one-step process would require a higher energy input and may not be as economically viable.
Methanol (CH3OH) is produced from methane (CH4) and water (H2O) through a two-step process. In Step 1, methane and water react to form carbon monoxide (CO) and hydrogen gas (H2). This reaction has a standard enthalpy change (ΔH°) of 214.7 kJ and a standard entropy change (ΔS°) of -332.3 J/K at 298 K.

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The general structure of a carboxylic acid is shown by option D.

In organic chemistry, a carboxylic acid is an organic acid that consists of a carboxyl group connected to an R-group. the overall components of carboxylic acid are R−COOH or R−CO₂H, with R referring to the alkyl, alkenyl, aryl, or other institution. Carboxylic acids arise broadly.

A carboxylic acid is a natural compound that incorporates a carboxyl group (C(=O)OH). the general formulation of a carboxylic acid is R–COOH, with R referring to the relaxation of the molecule. A carboxylic acid may be the concept of a mixture between functional corporations: an alcohol institution, related to hydrogen certain to oxygen, which attaches to a carbonyl institution, involving a carbon double sure to oxygen.

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Answer:

B and C

Explanation:

A. Their particles are held together by chemical bonds.

This option is incorrect for both compounds and mixtures. It is only true for Compounds.

B. They are made up of more than one type of atom.

This is correct. Both compounds and mixtures consists of different atoms of elements.

C. They can be separated into two or more elements.

This option is correct. Compounds are broken down into elements through chemical means.

D. Their particles all have the same chemical formula.

This is wrong. Mixtures do not have chemical formula

Answer:a and c

Explanation:

apex