Stoichiometry
The heat of solution depends upon the

Nature of solvent
Nature of solute
Concentration of solution
All of these

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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 4
Equivalent weight of the metal is 8

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