Calculate the concentrations of H+ and OH- in a 1.7 x 10-4 M solution of HNO3 (nitric acid). Be sure to show your steps

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?