How do i calculate the number of moles of magnesium, chlorine, and oxygen atoms in 7.70 moles of magnesium perchlorate, #"Mg"("ClO"_4)_2#. Express the number of moles of Mg, Cl, and O atoms numerically, separated by commas. moles of Mg, Cl, O =?

1 Answer
Mar 13, 2018

Answer:

#7.7,15.4,61.6#

Explanation:

#1 "mol" " Mg"("ClO"_4)_2# contains :-

  • #color(red)(1 "mol Mg atoms")#
  • #color(blue)(2 "mol Cl atoms"#
  • #color(green)(8 "mol O atoms"#

To find no. of moles of each element, we can multiply the above values by #7.7"mol"#

#color(red)(1 "mol Mg atoms")/(1 "mol" " Mg"("ClO"_4)_2)times7.7 "mol" " Mg"("ClO"_4)_2=1times7.7=7.7"moles"#

Similarly,

#color(blue)(2 "mol Cl atoms")/(1 "mol" " Mg"("ClO"_4)_2)times7.7 "mol" " Mg"("ClO"_4)_2=2times7.7=15.4"moles"#

#color(green)(8 "mol O atoms")/(1 "mol" " Mg"("ClO"_4)_2)times7.7 "mol" " Mg"("ClO"_4)_2=8times7.7=61.6"moles"#