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

Round your answer to the nearest tenth, when appropriate. Use the formula $\mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] , \text {as }$ needed.
-Find the $\left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]$ if the $\mathrm { pH } = 2.3$ .

A) $2.7 \times 10 ^ { 1 }$
B) $5.0 \times 10 ^ { - 3 }$
C) $2.0 \times 10 ^ { 2 }$
D) $3.6 \times 10 ^ { - 1 }$

Correct Answer:

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