Question

A compound contain 36.5% Na, 25.4% S and 38.1% 0. Calculate the molecular formula
if its molar mass is 126u.​

Answer 1

Answer:

Dear Student,

Element

percentage Atomic mass percentage / mass Simple ratio whole number ratio

sodium 36.5 23 1.5 1.5/0.79= 1.8 2

Sulphur 25.4 32 0.79 0.79/0.79=1 1

oxygen 38.1 16 2.3 2.3/0.79=2.9 3

Thus the empirical formula = Na2SO3

Molecular formula = Empirical formula x n

n = Molecular mass/ Empirical formula mass

= 126/ Formula Mass of Na2SO3

= 126 /126

= 1

Thus the molecular formula = Na2SO3

Explanation:

sorry I can't answer accurately