Question

Calculate the number of moles in 125g of Copper (II) Hydroxide. URGENT!

Answer 1

Answer:

1.28 mol Cu(OH)₂

General Formulas and Concepts:

Chemistry - Atomic Structure

• Reading a Periodic Table
• Using Dimensional Analysis

Explanation:

Step 1: Define

125 g Cu(OH)₂

Step 2: Identify Conversions

Molar Mass of Cu - 63.55 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of Cu(OH)₂ - 63.55 + 2(16.00) + 2(1.01) = 97.57 g/mol

Step 3: Convert

$125 \ g \ Cu(OH)_2(\frac{1 \ mol \ Cu(OH)_2}{97.57 \ g \ Cu(OH)_2} )$ = 1.28113 mol Cu(OH)₂

Step 4: Check

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

1.28113 mol Cu(OH)₂ ≈ 1.28 mol Cu(OH)₂