Dtermine the volume in liters occupied by 0.030 miles of a gas at stp

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

How many moles of oxygen react with 12 moles of aluminum

Consider the story you just read. all but one of the choices below indicate that something is living.