Molecular Mass Calculations
ChemistryClass 10CBSEAnswered 20 May 2026
Answer
NaOH molecular mass = 40 g/mol:
Na(23) + O(16) + H(1) = 40 g/mol
FeSO₄·7H₂O (Green Vitriol) = 278 g/mol:
Fe(56) + S(32) + 4×O(16) + 7×H₂O(18)
= 56 + 32 + 64 + 126 = 278 g/mol
Na₂SO₄·10H₂O (Washing Soda / Glauber's Salt) = 322 g/mol:
2×Na(23) + S(32) + 4×O(16) + 10×H₂O(18)
= 46 + 32 + 64 + 180 = 322 g/mol