Nitrogen forms five stable oxides with oxygen of the formulae N2O, NO, N2O3, N2O4, N2O5. This oxide formation explains which law of chemical combination?
How many number of moles of oxygen atoms are present in 0.6 mole of hydrated oxalic acid (COOH)22H2O?
How many molecules of hydrogen are present in 112 mL of a gas at NTP?