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3 years ago

Which of the following molecules experience dipole-dipole forces as its strongest IMF? A) H2 B) SO2 C) NH3 D) CF4 E) BCl3

Chemistry

1 answer:

Xelga [282]3 years ago

5 0

Answer: $NH_3$

Explanation:

a) $H_2$ : This is a non polar covalent compound which are held by weak vanderwaal forces of attraction.

b) $SO_2$ : This is a covalent compound which is polar due to the presence of lone pair of electrons and are held by dipole-dipole forces of attraction.

c) $NH_3$ : These are joined by a special type of dipole dipole attraction called as hydrogen bond. It forms between electronegative nitrogen atom and hydrogen atom and is the strongest interaction.

d) $CF_4$ : This is a covalent compound and is non polar which are held by weak vanderwaal forces of attraction.

e) $BCl_3$ : This is a covalent compound and is non polar which are held by weak vander waal forces of attraction.

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D. Process B, because it is a spontaneous process.

<h3><u>Explanation</u>;</h3>

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Why are forest fires so difficult to extinguish? Make reference to the energetics of combustion reactions.

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3 years ago

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djyliett [7]

Answer:

-100.125

Explanation:

We are given

CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (l) △H = -890.0 kJ/mol

The given information is for complete reaction

we have 1.8grams of Methane

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No of moles of Methane = 1.8/ 16

= 0.1125

So the amount of the heat will be released from the amount of the methane

Q = No of moles*( -890.0 kJ/mol)

= 0.1125*(-890)

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3 years ago

Calculate the concentrations of H3O(+) and SO4(2-) in a solution prepared by mixing equal volumes of 0.2M HCl and 0.6M H2SO4.

Naily [24]

Answer:

[H₃O⁺] = 0.7M

[SO₄²⁻] = 0.3M

Explanation:

The HCl in solution produce 1mole of H₃O⁺ and H₂SO₄ produce 2 moles of H₃O⁺.

When two solutions are mixing in equal volumes, the concentrations of both reactants is halved regard to their initial concentrations. That is:

HCl = 0.1M

H₂SO₄ = 0.3M

And H₃O⁺ will be:

0.1M + 2*0.3M = 0.7M

And SO₄²⁻ comes just from H₂SO₄, that means:

[H₂SO₄] = [SO₄²⁻] = 0.3M

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3 years ago

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tatuchka [14]

Answer:

A. Non-Newtonian behavior and Viscoelastic behavior

Explanation:

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-- Looking at these definitions I feel that only the ones I chose fit correctly with the question. Please let me know if I am correct.

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3 years ago