Which formula can be used to calculate the molar mass of water (H2O)?
A) 2 x molar mass of H + 2 x molar mass of O

B) molar mass of H + 2 x molar mass of O

C) 2 x molar mass of H + molar mass of O

D)) molar mass of H+ molar mass of O

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Ineed ! i have no clue how to do this problem.

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.