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3 years ago

Which of the following compounds will experience hydrogen bonding?

Chemistry

2 answers:

lora16 [44]3 years ago

7 0

I believe the answer is the first one <span>NaH</span>

Natalka [10]3 years ago

6 0

Answer:

HF will experience hydrogen bonding

Explanation:

Hydrogen bonding (H-bonding) is an intermolecular force having partial ionic-covalent character. H-bonding takes place between a hydrogen atom (attached with an electronegative atom e.g. O, N and F) and an electronegative atom (O,N and F).

Hydrogen bonding generally appears in covalent molecules.

Among all four given molecules, HF and $CH_{4}$ are covalent molecules.

In HF, F is a highly electronegative atom attached to a H atom through a covalent bond. Therefore F atoms gets partial negative charge and H atoms gets partial positive charge.

Hence an interaction arises between H atom and F atom resulting formation of H-bonding.

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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

In which state of the following compounds does nitrogen have the most positive oxidation state? group of answer choices no2 nano

Amiraneli [1.4K]

The compound nitrogen have most positive oxidation state is NO₂. The correct option is b.

<h3>What is oxidation state?</h3>

The total number of electrons gained or lost by an atom in order to form a chemical bond with another atom.

The charge on an ion is equal to the sum of the oxidation states of all the atoms in the ion. A substance's more electronegative elements are given a negative oxidation state.

A positive oxidation state is assigned to the less electronegative element.

Thus, the correct option is b, NO₂.

Learn more about oxidation state

brainly.com/question/11313964

#SPJ4

4 0

2 years ago

What is the correct mathematical relationship between the number of moles, the volume, and the standard molar volume of a substa

masha68 [24]

N=V/Vm

n - the number of moles
V - the volume
Vm=22.4 L/mol - the standard molar volume of gas

8 0

3 years ago

Read 2 more answers

A ball is moving at a speed of 6.70 m/s. If the kinetic energy of the ball is 3.10 J, what is the mass of the ball?

Anni [7]

Answer:

Explanation:

The mass of the ball can be found by using the formula

$m = \frac{2k}{ {v}^{2} } \\$

v is the velocity

k is the kinetic energy

From the question we have

$m = \frac{2(3.10)}{ {6.70}^{2} } = \frac{6.20}{44.89} \\ = 0.138115...$

We have the final answer as

Hope this helps you

7 0

3 years ago

The exploration of the mid-cayman rise is intended to discover _______. a. what life may have been like before the evolution of

Soloha48 [4]

The exploration of the mid-cayman rise is intended to discover that what life may have been like before the evolution of photosynthesis.

<h3>What is mid - cayman rise?</h3>

Mid - cayman rise is an area or era where only some amount of light is coming but still existence of life is present there.

As we know that plants make their own food by the process called photosynthesis in the presence of light, but this is not the scenario for all the time. Before the discovery of photosynthesis plants also prepared their own food.

Hence, option (a) is correct.

To know more about photosynthesis, visit the below link:

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4 0

2 years ago