Which solution contains the greatest number of molecules? #"A."# #"One kilogram of water;"# #"B."# #"One kilogram of heavy water;"# #"C."# #"1100 g of water;"# #"D."# #"1100 g of heavy water?"#

1 Answer
anor277
Dec 10, 2017

Would it not be #C,#? That is #1.1*kg# of WATER contains the most water molecules....

Explanation:

We assess the molar quantity of both #H_2O# and #D_2O#....

We gots a kilogram of water....i.e. a molar quantity of....

#(1000*g)/(18.01*g*mol^-1)=55.5*mol#; by this criterion, water is might concentrated stuff.

And the mass of this quantity of deuterium oxide, #""^2H_2O#, is given by the product...

#"Mass of deuterium oxide"=20.01*g*cancel(mol^-1)xx55.5*cancel(mol^-1)=1111*g#..

Your option is clear....

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