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The rate constant of the reaction $A \rightarrow B$ is $0.6\times10^{-3}$ mole per second. If the concentration of A is 5 M, then concentration of B after 20 minutes is:
A
0.36 M
B
0.72 M
C
1.08 M
D
3.60 M
Detailed Solution
The units of k (mol per second) show a zero order reaction: $x = kt$
$x = 0.6\times10^{-3}\times 20\times 60 = 0.72$ M
$x = 0.6\times10^{-3}\times 20\times 60 = 0.72$ M