chemistry

A compound is found to be 51.39% carbon, 8.64% hydrogen, and 39.97% nitrogen. It has a molecular molar mass of 140.22 g/mol. (This question requires one to find the empirical formula to end up with the final answer in molecular formula)
A. C10H14N2
B. C7H9N
C. C6H12N4
(The numbers are supposed to be subscripts)
I tried this problem by converting the percentages to grams, then dividing each element by its atomic mass, and lastly dividing each one by the lowest quotient. However, for the empirical formula I got C2H3N, which is wrong when you want to calculate the molecular formula using the empirical formula. Please help!

1. 👍
2. 👎
3. 👁
... not sure about the last "lowest quotient" step

C ... 140.22 * .5139 / 12.011 = 5.999
H ... 140.22 * .0864 / 1.0079 = 12.02
N ... 140.22 * .3997 / 14.007 = 4.001

looks like C.

1. 👍
2. 👎
2. thank you!

1. 👍
2. 👎

Similar Questions

1. science

All biomolecules are made up of the elements carbon, hydrogen, nitrogen, oxygen, and sulfur. carbon, hydrogen, nitrogen, and oxygen. carbon, hydrogen, oxygen, and sulfur. carbon, hydrogen, and oxygen.*** Nucleic acids are the

2. Biology

1. Which elements are most abundant in living organisms? A. hydrogen, carbon, calcium, potassium, oxygen, and phosphorus B. oxygen, calcium, phosphorus, sodium, hydrogen, and carbon C. carbon, potassium, iron, magnesium, hydrogen,

3. A.P Chemistry

Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined. Some of the data obtained are given below Percent by weight Molecular Compound of Element Q Weight X

4. Chemistry

Elemental analysis of a compound, once used as a pesticide, was found to be 74.2% carbon, 8.64% hydrogen, and 17.2% nitrogen. What is the empirical formula of this compound?

1. What type of bond holds the atoms together within a single molecule of water? a. Hydrogen bonds b. Nonpolar covalent bonds c. Polar covalent bonds *** d. Ionic bonds 2. Where are covalent bonds found? a. Both between and within

2. Chemistry

An unknown compound contains only carbon, hydrogen, and oxygen. Combustion analysis of the compound gives mass percents of 31.57% Carbon and 5.30% H. The molar mass is determined by measuring the freezing-point depression of an

3. Chemistry

A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.977 g/L at 680. torr and 84.1°C. What is the molecular formula of the compound?

4. Proteins (Help!)

What elements make up proteins? Is it carbon, oxygen, hydrogen, and nitrogen? Or is it carbon, oxygen. hydrogen, nitrogen, and sulfur?

1. chemistry

2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was found to be 60. a)What are the masses of carbon, hydrogen and oxygen in 2.4g of

2. Chemistry

A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 of the compound produced 0.213g CO2 and 0.0310 g H20. In another experiment, it is found that 0.103g of the compound produces 0.0230 g NH3. What

3. Biology

When proteins are broken down, phenylalanine is sometimes produced. Phenylalanine contains the elements carbon, nitrogen, hydrogen, and oxygen.Phenylalanine is which type of compound?

4. chemistry

A compound was found to contain 49.98 g carbon and 10.47 g hydrogen. The molar mass of the compound is 58.12 g/mol. What is the molecular formula?