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A solution of ethanol in water is 10% by...

A solution of ethanol in water is `10%` by volume. If the solution and pure ethanol have densities of `0.9866g//"cc"` and `0.785g//"cc"` respectively, find the per cent by weight.

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To solve the problem of finding the percentage by weight of ethanol in a solution that is 10% ethanol by volume, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Given Information**: - Volume percentage of ethanol in the solution = 10% - Density of the solution = 0.9866 g/cc - Density of pure ethanol = 0.785 g/cc ...
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Knowledge Check

  • A solution of methanol in water is 20% by volume. If the solution and pure methanol have densities of 0.964 kg and 0.793 kg L^(-1) respectively, find the per cent of methanol by weight?

    A
    15.8
    B
    16.45
    C
    17.6
    D
    14.8

  • A solution of ethanol in water is 10% by volume. If the solution and pure ethanol have densities of 0.9866 g mL^(-1) and 0.785 mL^(-1) respectively, the mass precent will be

    A
    0.0957
    B
    0.0759
    C
    0.0579
    D
    7.95%`

  • USP ethanol in aqueous solution is containing 95% ethanol by volume. At 20^(@)C , pure ethanol has a density of 0.789 g/mL and USP ethanol density 0.813 g/mL. What is the mass percentage of ethanol in USP ethanol ?

    A
    `46 %`
    B
    `90 %`
    C
    `86 %`
    D
    `93.3 %`

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