Stoichiometry
Gases diffuse faster compared to liquids because of the reason that the liquid molecules

Are heavier
Are held together by stronger inter-molecular forces
Have no definite shape
Move faster

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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

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

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