Question

Calculate the mass percent of different elements present in sodium sulphate (na2so4)

Answer 1

Explanation:

mass percentage of sodium

=2/7multiply100 =200/7%

mass percentage of oxygen

=4/7multiply by 100= 400/7%

and, mass percentage of na

=1/7multiply by 100= 100/7

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%