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What is the fraction of the mass of water due to neutrons?

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asked Nov 6, 2017 in Chemistry by jisu zahaan (28,760 points) ● 28 ● 437 ● 1096

What is the fraction of the mass of water due to neutrons?

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answered Nov 6, 2017 by sforrest072 (157,439 points) ● 63 ● 448 ● 1286

- 8/18 

Mass of one mole (Avogadro Number) of neutrons - 1 g 

Mass of one neutron =  1 / Avogadro Number (NA)g 

Mass of one molecule of water =  Molar mass / NA  = 18 /NA g

There are 8 neutrons in one atom of oxygen 

Mass of 8 neutrons =  8/ NA 

Fraction of mass of water due to neutrons - 8 /18

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