# chemistry

a compound contains 5.2% by mass Nitrogen. It also contains carbon, hydrogen and oxygen. Combustion of 0.085g of the compound produced 0.224g of carbon dioxide and 0.0372g of water. Calculate the empirical formula of the compound.

1. 👍 0
2. 👎 0
3. 👁 299
1. g N = 0.0850*0.052 = ?
g C = 0.224 g CO2 x (atomic mass C /molar mass CO2)= ?
g H = 0.0372 g H x (2*atomic mass H/molar mass H2O) = ?

g O = 0.085 - gC - gH - gN = ?

Now convert g to mols.
mols C = g C/atomic mass C = ?
mols H = g H/atomic mass H = ?
mols O = g O/atomic mass O = ?
mols N = g N/atomic mass N = ?

Now find the ration of these elements to each other with the smallest number no less than 1.00. The easy way to do that is to divide the smallest number by itself (which makes it 1.00), then divide the other numbers by the same small number. I've looked at these numbers and they don't come out to be whole numbers so you do this. Multiply each of the numbers, in succession, by 2, 3, 4, 5 etc until you get numbers that are close enough to whole numbers to round to a whole number for each. That will give you the empirical formula. Post your work if you run into trouble and I can help you thorough it.

1. 👍 0
2. 👎 0
posted by DrBob222
2. C^20H^16O

1. 👍 0
2. 👎 0
posted by Shruti

## Similar Questions

1. ### smk lutong

A compound consists only of carbon, hydrogen, nitrogen, and oxygen.  Combustion of 10.68 g of the compound  produced 16.01 g carbon dioxide and 4.37 g of water.  the molsr mass of the compound is 176.1

asked by nadeen on September 16, 2013
2. ### chemestry

A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157g of the compound produced 0.123g carbon dioxide and 0.0310g water. In another experiment, it is found that 0.103g of the compound produces

asked by salz on March 11, 2016
3. ### 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

asked by Bria on October 20, 2013
4. ### 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

asked by Bria on October 20, 2013
5. ### Chemistry

A 3.000 gram sample of an unknown compound containing the elements carbon, hydrogen, and nitrogen is analyzed by combustion. The combustion releases 4.714 grams of carbon dioxide and 1.500 grams of nitrogen. If 25 molecules have a

asked by Mom on October 18, 2011
6. ### chemistry

Suppose a substance has been prepared that is composed of carbon, hydrogen, and nitrogen. When 0.1156 gram of this compound is reacted with oxygen, 0.1638 gram of carbon dioxide (CO2) and 0.1676 gram of water (H2O) are collected.

asked by Chansa on June 3, 2016
7. ### chemistry

A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is the mass percent of oxygen in the compound?

asked by michelle on October 10, 2012
8. ### chemistry

A 230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. The rest is oxygen. What is the mass percent of oxygen in the compound?

asked by Anonymous on February 14, 2013
9. ### chemistry

An unknown organic compound that contains carbon,hydrogen and oxygen undergoes a combustion analysis. What happen to the carbon atoms and hydrogen atoms in the compound,assuming that the combustion goes to completion?

asked by Anonymous on October 18, 2011

More Similar Questions