Stoichiometry
For estimation of heat capacity of a solid compound, one can use

Gibb's equation
Trouton's rule
Kopp's rule
Clayperon's equation

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Stoichiometry
A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the

Atomic weight of the metal is 2
Atomic weight of the metal is 4
Equivalent weight of the metal is 8
Equivalent weight of the metal is 4

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