Question

"how many molecules of carbon dioxide exit your lungs when you exhale 5.00 × 10−2 mol of carbon dioxide, co2?"

Answer 1

The number of CO2 molecules that exit is calculated as follows

by use of Avogadro law constant

1 mole = 6.02 x10^23 molecules
5.00 x10^-2 mol =? molecules

{( 6.02 x10^23)x (5.00 x10^-2) / 1} = 3.01 x10^22 molecules

Answer 2

we are going to use Avogadro's constant to calculate how many molecules of

carbons dioxide exist in lungs:

when 1 mole of CO2 has 6.02 x 10^23 molecules, so how many molecules in

CO2 when the number of moles is 5 x 10^-2

number of molecules = moles of CO2 * Avogadro's number

= 5 x 10^-2 * 6.02 x 10^23

= 3 x 10^22 molecules

∴ There are 3 x 10^22 molecules in CO2 exist in lungs