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2 g of a mixture of CO and CO2 on reacti...

2 g of a mixture of CO and `CO_2` on reaction with excess `I_2 O_5` produced 2.54 g of `I_2`. What would be the mass % of `CO_2` in the original mixture?

A

60

B

30

C

70

D

35

Text Solution

Verified by Experts

The correct Answer is:
B
`5 CO + I_2 O_5 to 5CO_2 +I_2 `
1 mole of `I_2 -= 1` mole of `I_2 O_5 -= 5` moles of CO
hence , mol of CO `= 5 xx( 2.54 )/( 254 ) = 0.05`
mass of CO `= 0.05 xx 28 = 1.4 g`
mass of ` CO_2 - 1.4 = 0.6 g`
Mass % of ` CO_2 = ( 0.6 )/( 2 ) xx 100 ) = 30 % `
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