A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?

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1. A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?

   A. C2H4 B. C3H6 C. C4H8 D. C5H10 Submitted by: Muhammad Ali Kunbhar...

2. The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound?

   A. 5 B. 6 C. 7 D. 8 Submitted by: Muhammad Ali Kunbhar...

3. The molar mass of an organic acids is determined by____________?

   A. Depression of freezing point B. Volumetric method C. Victor Meyer’s method D. Osmosis method Submitted by: Muhammad Ali Kunbhar...

4. Ammonium cynanate was 1st Inorganic compound that was converted into an Organic compound (in Lab) through boiling water. The organic compound was____.

   A. Methane B. Ethanol C. Acetic acid D. Urea Submitted by: Aamir khan Hullio...

5. By which method the molecular mass of benzene was determined as 78.108 ?

   A. Specific gravity method B. Vapour density method C. X-ray diffraction method D. Distillation methos...

6. A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

   A. 74% Fe B. 75% Fe C. 77% Fe D. 78% Fe Submitted by: Muhammad Ali Kunbhar...

7. Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse ?

   A. 20cm3/min B. 40cm3/min C. 160cm3/min D. 2.5cm3/min...

8. The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of__________________?

   A. vaporization B. evaporation C. crystallization D. sublimation...

9. 0.5 mole of nitrogen gas and 0.5 mole of carbon monoxide gas at STP have same_____________?

   A. Value of a B. Mass C. Atoms D. Both B and C...

10. How many isomeric aldoses are possible for the molecular formula C6H12O6?

    A. 2 B. 4 C. 7 D.16 Submitted by: Muhammad Ali Kunbhar...