How to make a lightsaver

Chemistry

1 answer:

Nikolay [14]3 years ago

7 0

saber is the right word

the should not be on brainly but...

idd get some glow sticks and put them in a this plastic rap then get some sort of handle or something and put plastic on the outsided too make it strait OR mow the lawn get 5 bucks and buy one

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Plz Answer all three questions thx ;)

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A certain first-order reaction (A→products) has a rate constant of 8.10×10−3 s−1 at 45 ∘C. How many minutes does it take for the

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Answer:

The answer is 5.7 minutes

Explanation:

A first-order reaction follow the law of $Ln [A] = -k.t + Ln [A]_{0}$ . Where [A] is the concentration of the reactant at any t time of the reaction, $[A]_{0}$ is the concentration of the reactant at the beginning of the reaction and k is the rate constant.

Dropping the concentration of the reactant to 6.25% means the concentration of A at the end of the reaction has to be $[A]=\frac{6.25}{100}.[A]_{0}$ . And the rate constant (k) is 8.10×10−3 s−1