How to find valency of an element

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.

Displacement is the slope of a velocity vs. time graph a. true b. false

Correct relationship between molecular formula and empirical formula