How many molecules of water, H₂O, are created by 6.56 grams H₂O?

Answer 1

1). Convert g to mols

2).. Convert mols to molecules

1). 6.56 g H2O x 1 mol H2O / 18 g = 0.364 mols H2O

2). 0.364 mols H2O x 6.02x20²³ molecules / mol = 2.19x10²³ molecules H2O