Question

Calculate the mass % of different element present in na2so4

Answer 1

Explanation:

Mass of Na2SO4 = 2*23 + 32 + 4*16 = 46 + 32 + 64 = 142 g

now,

mass% of Na = (46/142)×100 = 32.39%

mass% of S = (32/142)×100 = 22.53%

mass% of O = (64/146)×100 = 45.07%

Answer 2

Answer:

Molar mass of Na2SO4 = [(2 × 23.0) + (32.00) + 4 (16.00)] = 142 g

Mass percent of an element = (Mass of that element in compound/Molar mass of that compound) × 100

∴ Mass percent of sodium (Na): (46/142) × 100 = 32.39%

Mass percent of sulphur(S): (32/142) × 100 = 22.54%

Mass percent of oxygen:(O): (64/142) × 100 = 45.07%