Formula for Tungsten(V) Selenide

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.

Why does his teacher ask him to balance the equation by including the correct coefficient

How many moles of oxygen gas are produced from the decomposition of six moles of potassium