Arrange the following in order of increasing mass (i) 3.0115  ×  1023 molecules of white phosphorus(ii) 10 moles of H2 gas(iii) 1 g molecule of anhydrous Na2CO3(iv) 33.6 L of CO2 gas at STP

(i) At. wt. of P = 31 and atomicity of P is 4Mol. wt.of white P = 31 x 4 = 124∴  6.023  ×  1023 molecules  of white  P  weigh  124 g∴  3.0115  ×  1023 molecules  of white  P  weigh  1246.023 × 3.015=62g ii  Wt.  of  1  mole  of H2 gas=2 gWt.  of  10  moles  of  H2 gas=2 × 10=20 giii 1 g  molecule  of anhydrous  Na2CO3 = Mol  wt.  of  Na2CO3                                                                               in  g=106  giv At STP  22.4  L  CO2 weighs  44  g∴   33.6  L  CO2  weighs  4422.4 ×  33.6  g                                           =66  gSo,  the  correct  choice   ii<  i <  iv <  iii