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

question 105

Multiple Choice

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 $\left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]$ if the $\mathrm { pH } = 9.4$ .

• A) \(2.5 \times 10 ^ { - 9 }\)
• B) \(4.0 \times 10 ^ { - 9 }\)
• C) \(4.0 \times 10 - 10\)
• D) \(2.5 \times 10 ^ { - 10 }\)

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Definitions:

Standard Deviation

The statistical metric that calculates the dispersion or spread of data points in a dataset around the average value.

Raw Score

An untreated score before manipulation or processing to make it a standard score, as must be done for all norm-referenced tests. Raw scores alone tell us little, if anything, about how a person has done on a test. We must take an individual’s raw score and do something to it to give it meaning.

Publisher Score

The score provided or established by the entity responsible for creating and distributing a test, indicating a test taker's performance relative to predefined criteria or norms.

Ordinal Scale

A scale of measurement in which the magnitude or rank order is implied; however, the distance between measurements is unknown.