A gas mixture contains O₂ and N₂ in ratio of 1:4 by weight. The ratio of their number of molecules is (JIPMER 2008)

Given, 2 2 1 4 weight of O weight of N Let, the weight of oxygen ( 2 O ) = 1x The weight of nitrogen ( 2 N ) = 4x Molecular mass of oxygen = 32 g Molecular mass of nitrogen = 28 g 2 2 1 Number of moles or molecules of 32 4 Number of moles or molecules of 28 28 7 32 4 32 x O x N x 16. An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be (AIPMT 2008) (a) CHO (b) CH₄O (c) CH₃O (d) CH₂O Element % Atomic mass Mole Simple ratio C 38.71 12 38.71 3.22 12 3.22 1 3.22 H 9.67 1 9.67 9.67 1