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MA_775_DIABLO [31]
3 years ago
8

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

Chemistry
1 answer:
a_sh-v [17]3 years ago
6 0

Answer:

8.72 mol PbO₂

General Formulas and Concepts:

<u>Chemistry - Atomic Structure</u>

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

Explanation:

<u>Step 1: Define</u>

5.25 × 10²⁴ formula units PbO₂

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

<u />5.25 \cdot 10^{24} \ formula \ units \ PbO_2(\frac{1 \ mol \ PbO_2}{6.022 \cdot 10^{23} \ formula \ units \ PbO_2} ) = 8.71803 mol PbO₂

<u>Step 4: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules and round.</em>

8.71803 mol PbO₂ ≈ 8.72 mol PbO₂

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