Class 11th Science ( Chemistry)
Chapter 1 Some Basic Concepts of Chemistry 1. Calculate the molecular mass of the following : (i) H2O (ii) CO2 (iii) CH4 Solution : (i)CH4 :Molecular weight of methane, CH4= (1 x Atomic weight of carbon) + (4 x Atomic weight of hydrogen)= [1(12.011 u) +4 (1.008u)]= 12.011u + 4.032 u= 16.043 u (ii) H2O … Read more