3 years ago

Choose the element that is more reactive: oxygen or argon.

Chemistry

1 answer:

Mazyrski [523]3 years ago

7 0

I choose oxygen because

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2 years ago

A certain first-order reaction is 27.5 percent complete in 8.90 min at 25°C. What is its rate constant?

jeyben [28]

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Explanation:

Hello there!

In this case, according to the given information, it turns out necessary for us remember that the first-order kinetics is given by:

$ln(A/A_0)=-kt$

Whereas the 27.5% complete means A/Ao=0.275, and thus, we solve for the rate constant as follows:

$k=\frac{ln(A/A_0)}{-t}$

Then, we plug in the variables to obtain:

$k=\frac{ln(0.275)}{-8.90min}\\\\k= 0.145min^{-1}$

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