Answers - Percent Composition

Arkansas State University
Department of Chemistry
and Physics

Answers

Percent Composition

Calculate the percent composition for each of the following:

a) NaHCO₃ 27.37 % Na; 1.20 % H; 14.30 % C; 57.14 % O (molar mass = 84.01 gmol^-1)

b) H₂O 11.21 % H; 88.79 % O (molar mass = 18.02 gmol^-1)

c) Fe₃O₄ 72.36 % Fe; 27.64 % O (molar mass = 231.55 gmol^-1)

d) (NH₄)₂SO₄ 21.20 % N; 6.11 % H; 24.26 % S; 48.43 % O (molar mass = 132.16 gmol^-1)

e) Ca₃(PO₄)₂ 38.76% Ca; 19.97 % P; 41.27 % O (molar mass = 310.18 gmol^-1)

a) NaHCO₃	27.37 % Na; 1.20 % H; 14.30 % C; 57.14 % O	(molar mass = 84.01 gmol^-1)
b) H₂O	11.21 % H; 88.79 % O	(molar mass = 18.02 gmol^-1)
c) Fe₃O₄	72.36 % Fe; 27.64 % O	(molar mass = 231.55 gmol^-1)
d) (NH₄)₂SO₄	21.20 % N; 6.11 % H; 24.26 % S; 48.43 % O	(molar mass = 132.16 gmol^-1)
e) Ca₃(PO₄)₂	38.76% Ca; 19.97 % P; 41.27 % O	(molar mass = 310.18 gmol^-1)