> H2O
   H (Hydrogen), wt = 1.00794 x 2, wt = 2.01588
   O (Oxygen), wt = 15.9994
Molecular weight of H2O is 18.0153

> NaCl
   Na (Sodium), wt = 22.9898
   Cl (Chlorine), wt = 35.453
Molecular weight of NaCl is 58.4428

> H2SO4
   H (Hydrogen), wt = 1.00794 x 2, wt = 2.01588
   S (Sulfur), wt = 32.065
   O (Oxygen), wt = 15.9994 x 4, wt = 63.9976
Molecular weight of H2SO4 is 98.0785

> CH3CH2OH
   C (Carbon), wt = 12.0107
   H (Hydrogen), wt = 1.00794 x 3, wt = 3.02382
   C (Carbon), wt = 12.0107
   H (Hydrogen), wt = 1.00794 x 2, wt = 2.01588
   O (Oxygen), wt = 15.9994
   H (Hydrogen), wt = 1.00794
Molecular weight of CH3CH2OH is 46.0684

> C6H2CH3(NO2)3
   C (Carbon), wt = 12.0107 x 6, wt = 72.0642
   H (Hydrogen), wt = 1.00794 x 2, wt = 2.01588
   C (Carbon), wt = 12.0107
   H (Hydrogen), wt = 1.00794 x 3, wt = 3.02382
      N (Nitrogen), wt = 14.0067
      O (Oxygen), wt = 15.9994 x 2, wt = 31.9988
      subtotal for NO2 = 89.1146 x 3 = 138.017
Molecular weight of C6H2CH3(NO2)3 is 227.131