What is the mass of 8.22×10²⁴ molecules of h2

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

C3h8o3 - glycerol major species present when dissolved in water

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-