How many moles are in 349.3 g of H2O

Question

Chemistry

Brent Parsons

27 April, 14:22

How many moles are in 349.3 g of H2O

+2

Answers (2)

Know the Answer?

Leonel Stark · Answer 1

Answer: 19.405 mol

Explanation: 1 mol of H2O is equal TO 18 g/mol

349.3 g of H2O / 18 g/mol=19.405

Kenneth Robertson · Answer 2

19.38 moles

Explanation: When in doubt, use stoichiometry

Molar mass of H2O = 2 (molar mass H) + molar mass O

=2 (1.01) + 16.00 = 18.02

Now, you just convert:

349.3g (1 mol H2O/18.02gH2O)

= 19.384

But the value given has 4 significant figures, so we write it as 19.38