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17 November, 04:55

How many nitrogen atoms are in 4.24 x 1022 molecules of Ca (NO3) 2?

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Answers (1)
  1. 17 November, 06:46
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    8.48 * 10²² atoms of Nitrogen

    Explanation:

    Calcium Carbonate is an ionic compound made up to Calcium (Ca²⁺) and Nitrate (NO₃⁻) ions. Also, the subscript 2 after the closed bracket after NO₃ specifies that there are two moles of NO₃⁻ in calcium nitrate compound. Hence, in total we can say that this compound contain,

    1 atom of Calcium

    2 atoms of Nitrogen

    6 atoms of Oxygen

    Therefore,

    When,

    1 molecule of Ca (NO₃) ₂ contains = 2 atoms of Nitrogen

    Then,

    4.24 * 10²² molecules of Ca (NO₃) ₂ will contain = X atoms of Nitrogen

    Solving for X,

    X = 2 atoms * 4.24 * 10²² molecule / 1 molecule

    X = 8.48 * 10²² atoms of Nitrogen
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