What are you doing when your diaphragm and rib muscles contract, and air
enters the space created inside your chest cavity?

•coughing

•eating

•inhaling

•exhaling

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

Classify this reaction: 2al+n2-> aln.

Calculate the mass of 0.750 mol of the following substance. na3po4.