sodium sulfate has the formula NA2SO4. a) what is the mass percentage of each element in sodium sulfate? b) how many grams of this compound contain 2.00grams sulfur

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Chemistry

Andreas Winters

20 January, 10:11

sodium sulfate has the formula NA2SO4. a) what is the mass percentage of each element in sodium sulfate? b) how many grams of this compound contain 2.00grams sulfur

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Rebecca Olson · Answer 1

Assuming 1 mol of Na2SO4, where its molar mass is 142 g/mol

%Na = [ (1 mol Na2SO4) (2 mol Na / 1 mol Na2SO4) (23 g Na / 1 mol Na) / (1 mol Na2SO4) (142 g / mol) ] * 100

%Na = 32.39 %

% S = (1 mol Na2SO4) (1 mol S / 1 mol Na2SO4) (32 g S / 1 mol Na) / (1 mol Na2SO4) (142 g / mol) ] * 100

%S = 22.54 %

% O = (1 mol Na2SO4) (4 mol O / 1 mol Na2SO4) (16 g O / 1 mol Na) / (1 mol Na2SO4) (142 g / mol) ] * 100

% O = 45.07 %