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Chemistry
Lorelei Cole
20 November, 17:08
How many molecules are there in 36 g of FeF3?
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Hayley Frank
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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