Acid Rain Is a Serious Environmental Problem

question 22

Multiple Choice

Acid rain is a serious environmental problem. A sample of rainwater collected in the Adirondack Mountains had an H⁺ concentration of 10^-4 mol/L. The pH of this sample was ________.

• A) 0.0001
• B) -4
• C) 4
• D) 10,000

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Definitions:

Independent Trials

Refer to experiments or trials in which the outcome of any single trial does not affect the outcomes of any other trials.

Null Hypothesis

A statistically formulated assertion that posits no relationship or difference between two or more groups or factors, serving as a default position until evidence suggests otherwise.

Chi-Square Test Statistic

A value derived from the chi-square test, representing the sum of the squared differences between observed and expected frequencies divided by the expected frequencies.

Goodness-Of-Fit Test

A statistical test used to determine how well observed sample data fit a distribution from a population with a normal distribution.