Stoichiometry
Pick out the wrong conversion formula for the conversion of weight units :

1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons
1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton
None of these
1 tonne = 1000 kg = 22.046 lbs

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

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