5) determine the mass in grams of 4.82 moles of water molecules if the molar mass of
water is 18.02 g/mol

86.9 g

Explanation:

Use the conversion factor: 4.82 mol H2O x (18.02g H2O/1 mol H2O)

The moles cancel out so we have to multiply 4.82 x 18.02 = 86.9

The answer is 3 sig. figs.

its first and third is your answer i did the qustion the fourth isnt right