Which of the following statements is/are...

Which of the following statements is/arecorrect

`Fe` is the limiting reagent.

The mass `O_(2)` left over at the end of the reaction is `1.2 g`

The mass of `Fe_(2)O_(3)` produced is `12.0g`

`O_(2)` is the limiting reagent.

Text Solution

Verified by Experts

The correct Answer is:

A, B, C

Mole of `O_(2) = (4.8)/(32) = 0.15 "mol" O_(2)`
Moles of `Fe` required `= (4 "mol" Fe)/(3 "mol" O_(2)) xx 0.15 = 0.2 "mol"`
Given mol of `Fe = 0.15`. Hence `Fe` is the limiting reagent and no `Fe` will remain after the reaction.
b. Weight of `O_(2)` required `= (0.15 "mol" Fe)`
`((3 "mol" O_(2))/(4 "mol" Fe))((32 g O_(2))/("mol" O_(2)))`
`= (0.15 xx 3 xx 32)/(4)`
`= 3.6 g O_(2)` required
Weight of `O_(2)` in excess `= (4.8 g O_(2)` present) `- (3.6 g O_(2)` required)
c. weight of `Fe_(2)O_(3)` produced `= (0.15 "mol" Fe)`
`((2 "mol" Fe_(2) O_(3))/(2 "mol" Fe))((160 g Fe_(2) O_(3))/("mol"Fe_(2) O_(3)))`
`= (0.15 xx 2 xx 160)/(4)`
`= 12.0 g Fe_(2) O_(3)` produced
d. `O_(2)` is not the limiting reagent.

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