Samples of several compounds are decomposed and the masses of their constituent

Question

Samples of several compounds are decomposed and the masses of their constituent elements are shown below. Calculate the empirical formula for each compound. Express your answer as a chemical formula.
2.677g Ba, 1.382g Cl
14.980g Cu, 7.557g S, 15.107g O Samples of several compounds are decomposed and the masses of their constituent elements are shown below. Calculate the empirical formula for each compound. Express your answer as a chemical formula.
2.677g Ba, 1.382g Cl
14.980g Cu, 7.557g S, 15.107g O Samples of several compounds are decomposed and the masses of their constituent elements are shown below. Calculate the empirical formula for each compound. Express your answer as a chemical formula.
2.677g Ba, 1.382g Cl
14.980g Cu, 7.557g S, 15.107g O

Explanation / Answer

mol Ba = mass/MW = 2.677/137.327 = 0.019493

mol Cl = mass/MW = 1.382/35.5 =0.039485

ratio

0.039485/0.019493 = 2.0255

then

BaCl2

2.

mol = mass/MW = 14.98/63.5 = 0.2359055

mol S = mass/MW = 7.557/32.065 = 0.235677530

mol O = mass/MW = 15.107/16 = 0.94418

ratio

0.94418/0.235677530 = 4

1:1 :4

CuSO4

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