Solution Found!
Solved: Determine the molecular formula for each of the
Chapter 14, Problem 5P(choose chapter or problem)
Problem 5P
Determine the molecular formula for each of the following:
a. a compound that contains only C and H and has a molecular ion with an m/z value of 72
b. a compound that contains C, H, and one O and has a molecular ion with an m/z value of 100
c. a compound that contains C, H, and two Os and has a molecular ion with an m/z value of 102
d. an amide that has a molecular ion with an m/z value of 115
Questions & Answers
QUESTION:
Problem 5P
Determine the molecular formula for each of the following:
a. a compound that contains only C and H and has a molecular ion with an m/z value of 72
b. a compound that contains C, H, and one O and has a molecular ion with an m/z value of 100
c. a compound that contains C, H, and two Os and has a molecular ion with an m/z value of 102
d. an amide that has a molecular ion with an m/z value of 115
ANSWER:
Solution 5P
(a)
The compound has m/z value of 72. If we divide the m/z value by 13 then we get 5 and the remainder will be 7. So, it indicates that the molecule contains only C and H in it.
Thus, number of carbons in the molecule is 5 and the number of hydrogen atoms in the molecule is.
Hence molecular formula is .
