D is correct for this question

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?

Identify and describe the three ways that mutations affect organisms.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons