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The weight of iron which will be convert...

The weight of iron which will be converted into its oxide `(Fe_(3)O_(4))` by the action of 18 g of steam on it will be: (Atomic mass of Fe=56)

A

168 g

B

84 g

C

42 g

D

21 g

Text Solution

Verified by Experts

The correct Answer is:
C
`underset(3xx56g)(3Fe)+underset(4xx18g)(4H_(2)O)toFe_(3)O_(4)+4H_(2)`
`4xx18g" "H_(2)O=3xx56g" "Fe`
`18g" "H_(2)O=(3xx56)/(4)`
`=42g`
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