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kaheart [24]
3 years ago
8

Ughh please help me ​

Chemistry
2 answers:
Alexxx [7]3 years ago
6 0

Answer:

Substance 2

Explanation:

I know this because substances with a stronger molecular attraction are less susceptible to melting quicker than substances who have a weaker attraction with each particle. Therefore, substance 2, which melted after substance 1, has a stronger molecular attraction then substance 1.

(copy and paste above if you want)

TEA [102]3 years ago
5 0

Answer:

Substance 2

Explanation:

The stronger the intermolecular forces are, the more energy is required, so the higher the melting point is.

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Answer:

6.66 s will it take for [AB] to reach 1/3 of its initial concentration 1.50 mol/L.

Explanation:

Rate = k[AB]^2

The order of the reaction is 2.

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\frac{1}{[A_t]} = \frac{1}{[A]_0}+kt

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[A_t] is the final concentration  = 1/3 of initial concentration = \frac{1}{3}\times 1.50\ mol/L = 0.5 mol/L

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Applying in the above equation as:-

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\frac{1}{1.5}+0.2x=\frac{1}{0.5}

t = 6.66\ s

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