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A chloride of an element contains 49.5% chlorine. The specific heat of the element is 0.056. calcualte the equivalent mass, valency and atomic mass of the element.

Answer»

Solution :Mass of chlorine in the metal chloride =49.5%
Mass of meta `=(100-49.5)=50.5`
EQUIVALENT mass of the metal `=("Mass of metal")/("Mass of chlorine")xx35.5
`=(50.5)/(49.5)xx35.5=36.21`
ACCORDING to Dulong and PETIT's law.
Approximate ATOMIC mass of the metal `=(6.4)/("specific heat")`
`=(6.4)/(0.056)=114.3`
`"velency"=("Approximate atomic mass")/("Equivalent mass")=(114.3)/(36.21)=3.1=3`
HENCE, exact atomic mass `=36.21xx3=108.63`.


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