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3 years ago

In which substance do the molecules have the strongest attractions to one another?

1 answer:

8 0

The substance that the molecules have the strongest attractions to one another is the sugar, a solid. The answer is letter A. The solid has a more definite shape and volume. The particles are locked into place. It cannot be further compressed due to the bond that exists between the molecules. The kinetic energy of the molecules is close to none because the molecules are so close and so compact with each other.

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How many molecules of CO2 are in 8.6 mol of CO2?

Anastasy [175]

Answer: You’d have to convert from mol to molecule.

Explanation: Like this:

8 0

3 years ago

How many moles of Cu(OH)2 are soluble in 1L of sodium hydroxide (NaOH) when the pH is 8.23?

Morgarella [4.7K]

Answer:

4.96E-8 moles of Cu(OH)2

Explanation:

Kps es the constant referring to how much a substance can be dissolved in water. Using Kps, it is possible to know the concentration of weak electrolytes. Then, pKps is the minus logarithm of Kps.

Now, we know that sodium hydroxide (NaOH) is a strong electrolyte, who is completely dissolved in water. Therefore the pH depends only on OH concentration originating from NaOH. Let us to figure out how much is that OH concentration.

$pH= -log[H]\\pH= -log (\frac{kw}{[OH]})$

$8.23 = - log(\frac{Kw}{[OH]} \\10^{-8.23} = Kw/[OH]\\ [OH] = Kw/10^{-8.23}$

$[OH]=1.69E-6$

This concentration of OH affects the disociation of Cu(OH)2. Let us see the dissociation reaction:

$Cu(OH)_2 -> Cu^{2+} + 2OH^-$

In the equilibrum, exist a concentration of OH already, that we knew, and it will be added that from dissociation, called "s":

The expression for Kps is:

$Kps= [Cu^{2+}] [OH]^2$

The moles of (CuOH)2 soluble are limitated for the concentration of OH present, according to the next equation.

$Kps= s*(2s+1.69E-6)^2$

"s" is the soluble quantity of Cu(OH)2.

The solution for this third grade equation is $s=4.96E-8 mol/L$

Now, let us calculate the moles in 1 L:

$moles Cu(OH)_2 = 4.96E-8 mol/L * 1 L = 4.96E-8 moles$

7 0

4 years ago

ICE Princess25 [194]

Answer:

qualitative data

and

quanitative data

Explanation:

hope this helps and PLZ brainliest thank you

3 0

3 years ago

Read 2 more answers

Identify the following reaction type using the chemical equation below*

OLEGan [10]

Answer:

its C. a combustion reaction

3 0

3 years ago

The free energy of an electrochemical cell is given by the equation:

Nuetrik [128]

To obtain the number of moles of electrons, we need to multiply both sides by 1/FE.

<h3>What is electrochemical cell?</h3>

The electrochemical cell is a cell in which energy is produced by chemical reactions which are spontaneous. We can obtain the free energy of an electrochemical cell using the equation; ΔG=-nFE

To make n the subject of the formula, we need to multiply both sides by 1/FE as follows;

$\frac{dG}{FE} = n$ .

Learn more about electrochemical cell: brainly.com/question/4592165

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3 years ago