chemist heats 100.0 g of in a crucible to drive off the water. If all the water is driven off, what is the mass of the remaining salt?

Find the mass in grams of hydrogen gas produced when 14.0 moles of hcl is added to an excess amount of magnesium.

What is the formula that this ionic compounds could form sr2+p3-o2-

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h