Does the size of oxygen molecules and carbon dioxide molecules support the claim that masks that block a viral particle will also block the passage of oxygen and carbon dioxide molecules? Explain the reasons for your answer.

Breathing through a mask decreases the amount of oxygen we need to live & be. The only potentially toxic molecule that you routinely exhale is carbon dioxide. Carbon dioxide would not be trapped by a mask.

Explanation:

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.