Fill in the physical properties of oxygen cited in the text: color: solubility in water: freezing point: ? c boiling point: ? c

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?

What is the maximum amount of al2(so4)3 which could be formed from 15.84 g of al and 12.89 g of cuso4?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.