The molecular mass of the organic compound is 78 and its % composition is 94.4% carbon and 78% hydrogen. Determine the molecular formula of the compound.
Answers
Answered by
8
Assuming it is a hydrocarbon.
carbon= 92.4 grams and hydrogen= 7.6 grams.
Moles of carbon= 92.4/12= 7.7 moles
Moles of Hydrogen= 7.6/1= 7.6 moles
Finding the simple ratios, C=7.7/7.6= 1 (approx) and H= 7.6/7.6= 1 .
Therefore empirical formula is CH.
n = molar mass/ molar mass of empirical formula
= 78/13
n = 6
carbon= 92.4 grams and hydrogen= 7.6 grams.
Moles of carbon= 92.4/12= 7.7 moles
Moles of Hydrogen= 7.6/1= 7.6 moles
Finding the simple ratios, C=7.7/7.6= 1 (approx) and H= 7.6/7.6= 1 .
Therefore empirical formula is CH.
n = molar mass/ molar mass of empirical formula
= 78/13
n = 6
Similar questions