How many silicons atoms are there in 0.0356 moles of silicon

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How many silicons atoms are there in 0.0356 moles of silicon

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Sapo 3 years 2021-07-18T17:31:53+00:00 1 Answers 7 views 0

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  1. thachthao
    0
    2021-07-18T17:33:39+00:00
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    Answer:

    2.14 × 10²² atoms Si

    General Formulas and Concepts:

    Atomic Structure

    • Reading a Periodic Table
    • Moles

    Stoichiometry

    • Using Dimensional Analysis

    Explanation:

    Step 1: Define

    Identify

    [Given] 0.0356 mol Si

    [Solve] atoms Si

    Step 2: Identify Conversions

    Avogadro’s Number – 6.022 × 10²³ atoms, molecules, formula units, etc.

    Step 3: Convert

    1. [DA] Set up:                                                                                                       \dipslaystyle 0.0356 \ mol \ Si(\frac{6.022 \cdot 10^{23} \ atoms \ Si}{1 \ mol \ Si})
    2. [DA] Multiply [Cancel out units]:                                                                        \dipslaystyle 2.14383 \cdot 10^{22} \ atoms \ Si

    Step 4: Check

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

    2.14383 × 10²² atoms Si ≈ 2.14 × 10²² atoms Si

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