Which of the following are correct values for the ideal gas laws constant r

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?

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table