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Reika [66]
2 years ago
11

Help with this question please i will mark you brainliest!!!

Chemistry
2 answers:
Sholpan [36]2 years ago
7 0
If i’m correct it should be B
tamaranim1 [39]2 years ago
5 0

Answer:

b

Explanation:

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For a first-order reaction, A → B, the rate coefficient was found to be 3.4 × 10-4 s-1 at 23 °C. After 5.0 h, the concentration
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Answer:

the original concentration of A = 0.0817092  M

Explanation:

A reaction is considered to be of first order it it strictly obeys the graphical equation method.

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\dfrac{3.4 \times 10^{-4}}{1.27944 \times 10^{-4}}=   log \dfrac{a}{0.00018}

2.657=   log \dfrac{a}{0.00018}

10^{2.657}= \dfrac{a}{0.00018}

453.94 = \dfrac{a}{0.00018}

a =453.94 \times 0.00018

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Explanation:

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