mass = volume x density = 2.2 mL x 1.00 g/mL = 2.2 grams
mols H2O in 2.2 g = grams/molar mass = 2.2/18 = 0.12
1 mol contains 6.02E23 molecules so there will be
6.02E23 molecules/mol x 0.12 moles = ? molecules H2O.
Volume of sample = 2.2 mL
Density of water = 1.00 g/mL
1) How many water molecules are in the cylinder?
1 answer