Question

How many atoms of Carbon are in 25.0 grams of Carbon

Answer 1

Do you know how to calculate the mass of one mole of carbon atoms?

Answer 2

yes, its 12.01 i think

Answer 3

That's correct! The molar mass of an element is equal to its atomic mass.

Now, how many moles of carbon atoms are in 25 grams of carbon if there is one mole of carbon atoms in 12.01 grams of carbon?

Answer 4

2.08159?

Answer 5

Yep, that's correct. All you have to do is convert the number of moles to the number of atoms. Do you remember the conversion factor for that?

Answer 6

6.02*10^23?

Answer 7

That's right. Multiplying your mole number by that gives you the number of atoms present in the sample.