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Rate Constant

The rate cons...

Question

The rate constant of the reaction $A \to B$ is $0.8 \times 10^{- 3} m o l L^{- 1} s^{- 1}$ . The concentration of $A$ is $5 M$ then what is the concentration of $B$ after $20$ minutes?

0.96 M

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1.08 M

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3.70 M

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0.28 M

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Solution

The correct option is A $0.96 M$
For zero order reaction, rate constant is $m o l L^{- 1} s^{- 1}$ .
Hence concentration of $B$ after $20$ minutes $= K T$
$= 0.8 \times 10^{- 3} \times 20 \times 60$
$= 0.96 M$

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