Chemistry

Question

Quick question! Help please!

How many atoms are in 0.654 moles of lithium chloride?


3.93 x 1023 atoms

7.87 x 1023 atoms

9.20 x 1023 atoms

1.18 x 1024 atoms

2 Answer

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  • Answer:

    7.87 x 10²³ atoms

    Explanation:

    The number of LiCl units is related to moles using Avogadro's constant (6.022 × 10²³ mol⁻¹):

    (0.654 mol)(6.022 × 10²³ mol⁻¹) = 3.93 x 10²³ LiCl

    One LiCl unit is composed of two atoms, one Li atom and one Cl atom, so the amount is multiplied by 2:

    (3.93 x 10²³)(2) = 7.87 x 10²³ atoms

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