What is the concentration of hydroxide ions in pure water at 30.0 °C, if Kw at this temperature is 1.47 × 10-14?单项选择题

A

1.00 × 10-7 M

B

1.30 × 10-7 M

C

1.47 × 10-7 M

D

8.93 × 10-8 M

E

1.21 × 10-7 M

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