How many moles of magnesium, chlorine, and oxygen atoms are there in 7.50 moles of magnesium perchlorate, #"Mg"("ClO"_4)_2#?

1 Answer
Meave60
Nov 9, 2015

#"7.50 mol Mg"("ClO"_4)_2# contains:

#"7.50 mol Mg atoms"#
#"15.0 mol Cl atoms"#
#"60.0 mol O atoms"#

Explanation:

#"1 mol Mg(ClO"_4)_2"# contains #"1 mol Mg atoms", "2 mol Cl atoms", and "8 mol O atoms"#.

To determine the number of moles of each element in #"7.50 mol"# of the compound, multiply the moles of each element times #"7.50"#.

#7.50cancel("Mg"("ClO"_4)_2)xx(1"mol Mg atoms")/(1cancel("mol Mg"("ClO"_4)_2))="7.50 mol Mg atoms"#

#7.50cancel("mol Mg"("ClO"_4)_2)xx(2"mol Cl atoms")/(1cancel("mol Mg"("ClO"_4)_2))="15.0 mol Cl atoms"#

#7.50cancel("mol Mg"("ClO"_4)_2)xx(8"mol O atoms")/(1cancel("mol Mg"("ClO"_4)_2))="60.0 mol O atoms"#

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