A sample of H2O contains 7.2 x 10 24 atoms. How many moles of water are in this sample?
Responses
6.02 moles
6.02 moles
11 moles
11 moles
12 moles
12 moles
7.2 moles
To determine the number of moles in a sample, you can use Avogadro's number, which states that there are 6.02 x 10^23 atoms in one mole of a substance.
Given that the sample contains 7.2 x 10^24 atoms, you can calculate the moles by dividing the number of atoms by Avogadro's number:
7.2 x 10^24 atoms / 6.02 x 10^23 atoms/mol = 12 moles
Therefore, the correct answer is 12 moles.