What quantity in moles of LiBr are in 66.1 grams of LiBr?

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?