Question

What is the weight of 12 moles of water

Answer 1

220 g H₂O

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Chemistry

Atomic Structure

• Reading a Periodic Table

Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

12 moles H₂O (water)

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

1. Set up:
   `\displaystyle 12 \ moles \ H_2O((18.02 \ g \ H_2O)/(1 \ mol \ H_2O))`
2. Multiply:
   `\displaystyle 216.24 \ g \ H_2O`

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

216.24 g H₂O ≈ 220 g H₂O