Only the b part I want to know

1.	Only the b part I want to know
Answer» Answer: a) 48% B) 43% EXPLANATION: a) Limestone formula = CACO3 Mass of Limestone = 40+12+3×16 = 100 Mass of OXYGEN in Limestone = 48 Percentage of Oxygen = Mass of O in CaCO3/ Mass of CaCO3×100 = 48/100×100 = 12/25×100 = 48% b) Washing soda formula = Na2CO3 Mass of washing soda = 2×23+12+3×16 = 106 Mass of SODIUM in washing soda = 46 Percentage of Sodium = Mass of Na in Na2CO3/ Mass of Na2CO3 ×100 = 46/106×100 = 23/53×100 = 43% hope this will help you

Answer»

Answer:

a) 48% B) 43%

a) Limestone formula = CACO3

Mass of Limestone = 40+12+3×16 = 100

Mass of OXYGEN in Limestone = 48

Percentage of Oxygen = Mass of O in CaCO3/ Mass of CaCO3×100 = 48/100×100 = 12/25×100 = 48%

b) Washing soda formula = Na2CO3

Mass of washing soda = 2×23+12+3×16 = 106

Mass of SODIUM in washing soda = 46

Percentage of Sodium = Mass of Na in Na2CO3/ Mass of Na2CO3 ×100 = 46/106×100 = 23/53×100 = 43%

hope this will help you

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