Stoichiometry
For an ideal gas, the compressibility factor

Is unity at all temperature
Decreases with pressure rise
Zero
Is unity at Boyle's temperature

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

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