The mass of one mole of any substance is equal to the

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?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

What must occur for air masses to form fronts