Please answer 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?

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Complete each row of the table below by filling in the missing prefix or missing exponent.