Question

22. DDT is widely used as an insecticide. Its molar
mass is 354.5g/mol. When DDT was analyzed by
a chemist he found that it contains 47.4% carbon.
How many carbon atoms are there in each DDT
molecule?
a. 10
b. 12
C. 14
d. 16

Answer 1

Answer:

C) 14

Explanation:

You get the total mass of carbon in 1 mole of DDT.

354.5g/mol * 47.4%/100% = 168.033g/mol

Now you divide that number with carbons atomic mass per mole.

168.033g/mol / 12.01g/mol = 13.99, which is expectingly 14

So here you go. The number of carbon atoms in 1 molecule of DDT is 14.

Answer 2

It is 14 ( a ddt molecule contains 14 carbon atoms ,9 hydrogen atoms and 5 chlorine atoms)