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Determine the pH of a solution in which the hydronium ion concentration is 3.5 x 10-4 M.

A Bronsted-Lowery acid donates a proton, H+, to another compound.

What is the hydroxide ion concentration of a solution at 25 °C that has a pH = 9.13?

A group of students were asked if they carry a credit card.  The responses are listed below in the table. If a student is a selected at random, find the probability that the student owns a credit card given that the student is a freshman.  Round your answer to three decimal places.

The figures below are similar.  Find the length of the missing side.

A group of students were asked if they carry a credit card.  The responses are listed below in the table. If a student is a selected at random, find the probability that the student owns a credit card given that the student is a freshman.  Round your answer to three decimal places.

A group of students were asked if they carry a credit card.  The responses are listed below in the table. If a student is a selected at random, find the probability that the student owns a credit card given that the student is a freshman.  Round your answer to three decimal places.

The figures below are similar.  Find the length of the missing side.

The Environmental Protection Agency must visit nine factories for complaints of air pollution.  In how many different ways can a representative visit five of the factories to investigate the claims this week?

The results of a medical test show that of 66 people selected at random who were given a test, 3 tested positive and 63 tested negative.  Determine the odds in favor of a person selected at random testing positive on the test.