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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 the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

The identities of substances are the same before and after which type of change