How many moles are in 3.011 * 10^23 molecules of H2O?
Solution
Problem
How many moles are in 3.011 * 10^23 molecules of H2O?
Use Avogadro's number: 1 mol = 6.022 * 10^23 molecules.
moles H2O = (3.011 * 10^23 molecules H2O) / (6.022 * 10^23 molecules/mol)
moles H2O = 0.5000 mol H2O.
Result
0.5000 mol H2O