Cu (s) + 4HNO3 (l) → Cu(NO3)2 (aq) + 2NO2 (g) + H2O (l) What kind of reaction is that?

Question

Cu (s) + 4HNO3 (l) → Cu(NO3)2 (aq) + 2NO2 (g) + H2O (l)

Answer 1

Oxidation of copper by concentrated nitric acid.

Note that hydrogen is not released.

Answer 2

change g of Cu to moles of Cu (use the atomic mass of copper) from the balanced equation you get the mole ratio between copper and NO2 (a million:2) so double the moles of copper to get moles of NO2 change moles of NO2 to liters of NO2 via remembering a million mole of gasoline occupies 22.4 L at STP so multiply the moles of NO2 via 22.4 L