Round Your Answer to the Nearest Tenth, When Appropriate $\mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]$

question 168

Multiple Choice

Round your answer to the nearest tenth, when appropriate. Use the formula $\mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]$ , as
needed.
-Find the pH if $\left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] = 7.9 \times 10 ^ { - 3 }$ .

• A) 3.1
• B) 3.9
• C) 2.9
• D) 2.1

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