Question

this is the chemical formula for nitrogen gas.
this is the chemical formula for hydrogen gas, which is highly flammable.
this is the chemical formula for carbon dioxide, which is a product of cellular respiration.
this is the chemical formula for carbon monoxide, which is a colorless and odorless gas that is toxic to humans.
this is the chemical formula for oxygen gas, which is a product of photosynthesis.
n₂ co₂ o₂ co h₂

Explanation:

Match each gas description to its standard chemical formula based on common chemical knowledge of these gases.

Answer:

This is the chemical formula for nitrogen gas. → $\text{N}_2$
This is the chemical formula for hydrogen gas, which is highly flammable. → $\text{H}_2$
This is the chemical formula for carbon dioxide, which is a product of cellular respiration. → $\text{CO}_2$
This is the chemical formula for carbon monoxide, which is a colorless and odorless gas that is toxic to humans. → $\text{CO}$
This is the chemical formula for oxygen gas, which is a product of photosynthesis. → $\text{O}_2$