How many moles are in 83.1g of H2O

4.61 mol H₂O

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

83.1 g H₂O

Step 2: Identify Conversions

Molar Mass of H - 1.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol

Step 3: Convert

= 4.61154 mol H₂O

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.61154 mol H₂O ≈ 4.61 mol H₂O

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explanation:  

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