A peice of chalk, CaCO4, had an initial mass of 43.5 g. The mass of the chalk decreased to 39.6 g after use. Which of these is the closest value to amount of chalk used

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

What is the rate law for the uncatalyzed reaction?

What would be the original temperature of a gas that has a volume of 2.0 l and a pressure of 2.0 atm and an unknown temperature that the volume increased to 3.5 l in its pressure decreased to 1.0 atm if the final temperature is measured to be 11°c