A 0.120 gram sample of Zn reacts with an excess of hydrochloric acid and produces 46.5 mL of H2 gas which is collected over water at a barometric pressure of 748 mm Hg and at 23° C. The vapor pressure of water at 23° C is 21 mm Hg. What is the molar mass of Zn?

Which of these best describes an ionic bond?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: