Question

Which describes the correct number and types of atoms in this molecular structure?

1. five C, eight H, two O

2. three C, two O, six H

3. two C, two O, nine H

4. four C, eight H, two O

Answer 1

Answer: Option (1) is the correct answer.

Step-by-step explanation:

The given compound is a di-ketone as it contains two molecules of the functional group
`C=O`.

So, in total there are two
`CH_(3)` and two
`C=O` groups but there is one
`CH_(2)` group.

Hence, we can conclude that in total the correct number and types of atoms in this molecular structure are as follows.

Carbon atoms = 5

Oxygen atoms = 2

Hydrogen atoms = 8

Answer 2

Answer: Option (1) is the correct answer.

Step-by-step explanation:

The molecular structure is as follows.

`CH_(3)-CO-CH_(2)-CO-CH_(3)`

This compound contains carbon (C) atoms, hydrogen (H) atoms, oxygen (O) atoms.

Or, the chemical formula of this compound is
`C_(5)H_(8)O_(2)`.

Thus, we can conclude that there are five carbon atoms, eight hydrogen atoms and two oxygen atoms.