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A mixture of petrol and ethyl alcohol co...

A mixture of petrol and ethyl alcohol contains 22.0 % alcohol. The density of the mixture is `0.800 g mL^(-1)`. What mass of alcohol is there in 40.0 mL of the mixture?

A

7.04 g

B

4.40 g

C

11

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Mass of mixture `= 40 mLxx(0.800 g)/(1 mL) = 32g`
Mass of alcohol = 22.0% of mass of mixture
`=(22)/(10)xx32g = 7.04g`
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