x Mast The F -, cl securel https://session.masteringchemi ProblemID 98552902 Exe

Question

x Mast The F -, cl securel https://session.masteringchemi ProblemID 98552902 Exercise 3.152 Part A A 2.52-g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was bumed in excess oxygen to yield 3.87 g of CO2 and O.792 g of H2O. Another sample of the same oompound, of mass 4.14 g, yielded 2.31 g of SOs.A third sample, of mass 5.66 g, was burned under different conditions to yield 2.49 g of HNO, as the only nitrogen containing product Calculate the empirical formula of the compound. Express your answer as a chemical formula. Enter the elements In the order: C,H,S,N,O. 5,5,49,57 Submit Incorrect; Try Again Provide Feedback

Explanation / Answer

% mass of C = 12 * 3.87 * 100 / (44 * 2.52) = 41.88 %

% mass of H = 2 * 0.792 * 100 / (18 * 2.52) = 3.49 %

% mass of S = 32 * 2.31 * 100 / (80 * 4.14) = 22.32 %

% mass of N = 14 * 2.49 * 100 / (5.66*63) = 9.78 %

% mass of O = 100 - 41.88 - 3.49 - 22.32 - 9.78 = 22.53 %

NOW,

Element Mass Number of moles Division by small number Nearest whole number

C 41.88 41.88 / 12 = 3.49 3.49 / 0.698 = 5 5

H 3.49 3.49 / 1 = 3.49 3.49 / 0.698 = 5 5

S 22.32 22.32 / 32 = 0.698 0.698 / 0.698 = 1 1

N 9.78 9.78 / 14 = 0.698 0.698 / 0.698 = 1 1

O 22.53 22.53 / 16 = 1.41 1.41 / 0.698 = 2.02 2

The emperical formula is,

C5H5SNO2

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