Answer
a. 4
b. 9.49
c. 4.64
d. 10.54
Work Step by Step
a. $-log(1\times10^{-4})=4$
b. $-log(3.2\times10^{-10})=9.49$
c. $-log(2.3\times10^{-5})=4.64$
d. $-log(2.91\times10^{-11})=10.54$
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