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If the decomposition reaction of 1.4 M initial hydrogen peroxide (H2O2) occurs so that after 3 minutes, 0.83 M is left, what is the rate of the reaction?

a. -0.019 M/s
b. -0.012 M/s
c. 0.0046 M/s
d. 0.0032 M/s

Please help! Thanks in advance.

1 answer

rate=change/time=(1.4-.83)/180s=.00326666...
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