What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen?

1 Answer
Oct 21, 2015

Answer:

#CH_2O#

Explanation:

To find the ratio in moles you divide by the #A_r# of each element.

Using approximate values:

Ratio in grams #C:H:OrArr#

#40:6.7:53.3#

Ratio in moles #rArr#

#40/12:6.7/1:53.3/16rArr#

#3.33:6.7:3.33#

Dividing through by #3.33rArr#

#1:2:1#

So the empirical formula is:

#CH_2O#