How many molecules are there in 0.029 moles of carbon dioxide gas, CO2?

ah, I guess this is sort of a trick question.

Saying you have a mole of something is like saying you have a dozen of them.
Except a mole means about 6*10^23 of them, not twelve of them.
So
you have .029 * 6 * 10^23 molecules

That 6*10^23 (closer to 6.022*10^23) is called Avogadro's number.

To find the number of molecules in a given amount of substance, you can use Avogadro's number. Avogadro's number is defined as 6.022 x 10^23 molecules per mole.

In this case, you have 0.029 moles of carbon dioxide gas. To calculate the number of molecules, you can use the following formula:

Number of molecules = moles of substance x Avogadro's number

Substituting the given values into the formula:

Number of molecules = 0.029 moles x 6.022 x 10^23 molecules/mole

Now, let's calculate the answer:

Number of molecules = 0.029 x 6.022 x 10^23

Number of molecules = 1.74658 x 10^22 molecules

Therefore, there are approximately 1.74658 x 10^22 molecules in 0.029 moles of carbon dioxide gas, CO2.