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The common name of the ore of iron - who...

The common name of the ore of iron - whose chemical formula is `Fe_(3)O_(4)`

A

Iron pyrites

B

Magnetite

C

Haematite

D

Spathic iron ore

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When steam is passed over hot iron, hydrogen is liberated and Fe_(3)O_(4) is formed according to the chemical equation 3 Fe + 4 H_(2)O to Fe_(3)O_(4) + 4 H_(2)(g) . In a typical reaction, 56 g iron was consumed. Calculate the following: The volume of H_(2) liberated at STP (when molar volume of H_(2) " is " 22.4 L )