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#1. An organic compound contains 12.67% carbon, 2.13% hydrogen and 85.11% of Br.[C=12,H=1,Br=80]. If the vapour density of the compound is 94. Calculate its molecular formula.
#2. In inorganic compound contains 47.9% K, Be=5.5% and 46.6% F.[K=39,Be=9,F=19] Calculate its molecular formula if its molecular weight is 163.
#3. A binary compound contains 12.5% hydrogen and the rest nitrogen.[H=1, N=14] If the molar mass of the compound is 32. Calculate its molecular formula.
#4. Calculate the % of carbon in C2H4O5. [C=12, H=1, O=16]
#5. The % of C in C2H5N. [C=12,H=1, N=14]
#6. An organic compound contains 23.76% Carbon, 5.94% Hydrogen and 70.30% Chlorine.[C=12,H=1,Cl=35.5] If its molecular mass is 50.5. Calculate its molecular formula.
#7. Anhydrous dibasic acid has 2.25% hydrogen, 26.7% carbon and 71.15% oxygen.[C=12,H=1,O=16] Calculate its molecular formula if the vapour density of the compound is 45.
#8. An inorganic compound contains 16.8% Na, 4.2% carbon, 72.73% oxygen and 6.99% hydrogen.[Na=23,C=12,O=16,H=1] If the molecular weight of the compound is 284. Calculate its molecular formula.
#9. A compound contains 40% Carbon, 6.7% Hydrogen and 53.3% Oxygen.[C=12,H=1,O=16] If the vapour density of the compound is 90. Calculate its molecular formula.
#10. A hydrocarbon contains 80% Carbon, 20% Hydrogen. [C=12, H=1]. If the vapour density of the compound is 15. Calculate its molecular formula.
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