Question

Determine the number of moles in 5.25x1024 formula units if lead (IV) oxide.

Answer 1

8.72 mol PbO₂

General Formulas and Concepts:

Chemistry - Atomic Structure

• Using Dimensional Analysis
• Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Step-by-step explanation:

Step 1: Define

5.25 × 10²⁴ formula units PbO₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

`5.25 \cdot 10^(24) \ formula \ units \ PbO_2((1 \ mol \ PbO_2)/(6.022 \cdot 10^(23) \ formula \ units \ PbO_2) )` = 8.71803 mol PbO₂

Step 4: Check

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

8.71803 mol PbO₂ ≈ 8.72 mol PbO₂