Explanation:
The compound 
is also known as carbon dioxide. It is a gas. It forms when one carbon atom combines with two oxygen atoms.
This can be illustrated as follows.
Consumption of carbon dioxide gas in very low concentrations is not harmful but consumption of its large concentration is very harmful as it can affect the respiratory system.
1 mol of anything has 6.02 * 10^23 items.
4 mol has 4 times as much
C: Answer <<<<< =========
Answer:
A
Explanation:
B and D have to do with plants
and C has nothing to do with cellular resporation.
I believe it the answer is 3412
1. A
2. B
3. A
4. A
5. A
6. C
7. A
8. A
9. ?
10. A
