3 years ago

Can someone help me pls i only have 5 mins to complete

Chemistry

1 answer:

Inessa [10]3 years ago

5 0

I think it is carbon

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3 years ago

At a certain temperature the rate of this reaction is first order in HI with a rate constant of 0.0632 s

kirza4 [7]

Answer:

$28.037\ \text{s}$

Explanation:

$[A]_0$ = Initial concentration = 1.28 M

$[A]$ = Final concentration = $0.17[A]_0$

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t = Time taken

For first order reaction we have the relation

$kt=\ln\dfrac{[A]_0}{[A]}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{[A]}}{k}\\\Rightarrow t=\dfrac{\ln\dfrac{[A]_0}{0.17[A]_0}}{0.0632}\\\Rightarrow t=28.037\ \text{s}$

Time taken to reach the required concentration would be $28.037\ \text{s}$ .

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3 years ago

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Rainbow [258]

Answer:

Explanation:

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H3O+ is the hydronium ion

From the question we have

$pH = - log(3.2 \times {10}^{ - 6} ) \\ = 5.49485..$

We have the final answer as

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