A mixture of gases contains H₂ and O₂ gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture ?

Equal masses of H₂, O₂ and methane have been taken in a container of volume V at temperature 27^oC in identical conditions. The ratio of the volumes of gases H₂ : O₂ : methane would be

When 22.4 liters of H_2(g) is mixed with 11.2 litres of Cl_2(g), each at S.T.P. the moles of HCl_(g) formed is equal to

1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel, Which reactant is left in excess and how much ? (At. wt. Mg = 24, O = 16)