A sample of air contains 4.56 x 10^24 molecules of CO2. Calculate how many moles of carbon dioxide are in that sample.
well, one mole is 6.02 x 10^23 molecules.
So, divide your number by that.
I'm not understanding. Are you saying to do 4.56 x 10^24 first, and it's answer divide by the answer of 6.02 x 10^23?
To calculate the number of moles of carbon dioxide in a sample, you need to use Avogadro's number, which relates the number of particles (in this case, molecules) to the amount in moles. Avogadro's number is approximately 6.022 x 10^23 particles per mole.
We can use the following formula to calculate the number of moles:
Number of moles = Number of particles / Avogadro's number
In this case, the number of particles is given as 4.56 x 10^24 molecules. Let's solve the equation:
Number of moles = (4.56 x 10^24) / (6.022 x 10^23)
To simplify the calculation, we can divide both numbers by 10^23:
Number of moles ≈ (4.56 / 6.022) x 10^(24-23)
Number of moles ≈ 0.7573 x 10
Now, let's multiply the coefficient by 10:
Number of moles ≈ 7.573 moles
Therefore, there are approximately 7.573 moles of carbon dioxide in the given sample.