A Solution of Ethanol, C₂H₅OH, Is Prepared by Dissolving 25

question 83

Multiple Choice

A solution of ethanol, C₂H₅OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?

• A)10.0%
• B)9.09%
• C)90.0%
• D)1.00%
• E)225%

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Definitions:

Multinomial Experiment

An experiment that involves trials where each trial results in one outcome from a set of more than two possible outcomes.

Fixed Number of Trials

A specified, constant number of attempts or operations conducted in an experiment or process, typically used in statistical trials.

Chi-Squared Distribution

A statistical distribution that represents the distribution of the sum of the squares of k independent standard normal random variables.

Skewed to the Right

A description of a distribution of data where the right tail (higher values) is longer than the left tail, indicating a concentration of lower values.