Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. the molecular weight is 194.19 g/mol.

Question

Chemistry

Coffey

4 April, 17:34

Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. the molecular weight is 194.19 g/mol.

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Answers (1)

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Van Barber · Answer 1

To determine molecular formula, we first need to find out its empirical formula,

Carbon. Hydrogen. Nitrogen. Oxygen

Mass. 49.98g. 5.19g. 28.85g. 16.48g

Mole. 4.165. 5.19. 2.06. 1.03

Divide 4. 5. 2. 1

by

smallest

So by comparing the mole ratio from the table above, i hope u understand the table

The empirical formula is C4H5N2O

given molecular mass = 194.19g

so

(C4H5N2O) n = 194.19

(48+5+28+16) n=194.19

n = 2

molecular formula = C8H10N4O2