Ineed plz this is driving me crazy

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?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Why is carbon ideal for making different compounds?