Question

Sodium Carbonate has the formula Na2C03.10H20
Calculate the relative molecular mass of sodium carbonate

Answer 1

Answer: 286 u

Explanation:

Relative masses of the atoms involved:

Na = 23 u
C = 12 u
O = 16 u
H = 1 u

Relative molecular mass of Na₂CO₃.10H₂O = 23×2 + 12 + 16×3 + 10×2×1 + 10×16 = 46 + 12 + 48 + 20 + 160 = 286 u

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