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3 years ago

How many moles are in 349.3 g of H2O

Chemistry

2 answers:

iogann1982 [59]3 years ago

7 0

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

Alex_Xolod [135]3 years ago

4 0

Answer:

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

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