Chapter#15, Stoichiometry, Exercise Numerical Problems,Part-I solved numericals,Class 10th Chemistry

calculate the number of moles volume and number of molecules? find the percentage of element? find the percentage purity of the sample? find the percentage yield of the reaction? 01:00-05:10 Numerical#15.1 05:10-10:00 Numerical#15.2 10:00-13:40 Numerical#15.3 13:40-21:40 Numerical#15.4