Question

Calculate the mass percentage of each element in the compounds given below.
(a) Na2CO3
(b) CaSO4

Answer 1

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Answer 2

Answer:

Explanation:

a) Molar mass of CaSO4 =40+321+4(16)=136g

Mass percent of Ca 40/136(100)=25.41%

Mass percent of S = 32/136(100)=23.52%

Mass percent of O =64/136(100)=42.05%

b) Molar mass of Na2CO3 =46+12+48=106g

Mass percent of Na =46/106(100)=43.39%

Mass percent of C =12/106(100)=11.32%

Mass percent of O = 48/106(100)=45.28%