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20 November, 17:08

How many molecules are there in 36 g of FeF3?

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  1. 20 November, 20:49
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    36 g of FeF₃ contain 1.92 * 10²³ molecules.

    Explanation:

    Given dа ta:

    Mass of FeF₃ = 36 g

    Number of molecules = ?

    Solution:

    First of all we will calculate the molar mass of FeF₃.

    Molar mass of FeF₃ = 55.845 + 18.998 * 3 = 112.84 g/mol

    The number of molecules will be determine through the Avogadro number.

    The number 6.022*10²³ is called Avogadro number and it is the number of atoms or molecules in one gram of atoms of an element or one gram molecules of a compound.

    112.84 g of FeF₃ = one mole of FeF₃ = 6.022*10²³ molecules

    36 / 112.84 * 6.022*10²³ molecules = 1.92 * 10²³ molecules

    36 g of FeF₃ contain 1.92 * 10²³ molecules.
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