A reaction produces 0.755 mol of H2O. How many molecules of water are produced?

4.55 * 10^23 molecules

Explanation:

This is a conversion problem. We know that one mole has 6.022 * 10^23 particles or molecules so we can use this as a conversion factor.

0.755 mol (6.022*10^23 molecules / 1 mol)

=4.55*10^23 molecules