2Ca(NO3)2 ⟶ 2CaO + 4NO2 + O2
328 g 112 g 89.6 lit
(i) 328 g of Ca(NO3)2 produces 112 g of calcium oxide.
∴ 82 g of Ca(NO3)2 will produce = 112\over 328 × 82 = 27.99 g = 28 g
Hence, 28 g of calcium oxide is produced.
(ii) 328 g of Ca(NO3)2 produces 4(22.4) lit of nitrogen dioxide.
∴ 82 g of Ca(NO3)2 will produce = 4 × 22.4\over 328 × 82
= 22.4 lit.
Hence, vol of nitrogen dioxide evolved = 22.4 lit.