A reaction produces 0.819 moles of h2o. how many molecules are produced?

To determine the number of molecules of H2O that is being produced, we need to convert moles to molecules. We need to use a conversion factor. For this case, we use Avogadro's number. It represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We calculate as follows:

0.819 moles H2O (6.022 x 10^23 molecules / 1 mole) = 4.93x10^23 molecules

The number of molecules of H2O produced would be 4.93x10^23 molecules.