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3 years ago

34

Chemistry

1 answer:

ddd [48]3 years ago

7 0

Answer:

116 °C

Explanation:

The given parameters of the Substance Q are;

The boiling point of Q = 445°

The substance Q is a solid at room temperature

Given that Q has a single fixed boiling point, Q, is suspected to be a pure substance, and it will therefore also have a fixed single melting point above room temperature;

Therefore, the best option is option C. 116 °C, which is above a single temperature value above 116 °C

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Mechanism with a small activation energy or one with large activation energy

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Answer:

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Explanation:

This is only the answer if you were asking:

"Which corresponds to the faster rate: a mechanism with a small activation energy or one with a large activation energy?"

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For the reaction below, complete the rate expression that relates the change in concentration with respect to time to the rate o

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Answer: Rate in terms of disappearance of $NO$ = $-\frac{1d[NO]}{2dt}$

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Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

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Rate in terms of disappearance of = $-\frac{1d[NO]}{2dt}$

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Rate in terms of appearance of $NOCl$ = $+\frac{1d[NOCl]}{2dt}$

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Cho 700ml dung dịch NaOH 0.1M vào 100ml dung dịch AlCl3 0.2M. Tính khối lượng kết tủa sau phản ứng

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