Stoichiometry
Methane is mixed with stoichiometric proportion of oxygen and completely combusted. The number of additional specifications required to determine the product flow rate and composition is

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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