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hichkok12 [17]
3 years ago
9

Suppose a piece of silver jewelry contains 7.49x10^22 atoms of silver (Ag). how many moles of silver are in the jewelry?​

Chemistry
1 answer:
zalisa [80]3 years ago
8 0

Answer:

0.124 mol Ag

General Formulas and Concepts:

<u>Atomic Structure</u>

  • Moles

<u>Stoichiometry</u>

  • Using Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

[Given] 7.49 × 10²² atoms Ag

[Solve] mol Ag

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

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                    \displaystyle 7.49 \cdot 10^{22} \ atoms \ Ag(\frac{1 \ mol \ Ag}{6.022 \cdot 10^{23} \ atoms \ Ag})
  2. [DA] Divide [Cancel out units]:                                                                       \displaystyle 0.124377 \ mol \ Ag

<u>Step 4: Check</u>

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

0.124377 mol Ag ≈ 0.124 mol Ag

Topic: AP Chemistry

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