Question

What is the mass of 2.18 mol of Cu?

Answer 1

139 g Cu

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
• Moles

Stoichiometry

• Using Dimensional Analysis

Step-by-step explanation:

Step 1: Define

[Given] 2.18 mol Cu

[Solve] grams Cu

Step 2: Identify Conversion

[PT] Molar Mass of Cu - 63.55 g/mol

Step 3: Convert

1. [DA] Set up:
   `\displaystyle 2.18 \ mol \ Cu((63.55 \ g \ Cu)/(1 \ mol \ Cu))`
2. [DA] Multiply [Cancel out units]:
   `\displaystyle 138.539 \ mol \ Cu`

Step 4: Check

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

138.539 g Cu ≈ 139 g Cu