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I need help answering this question please: a. How many grams of ethanol (C2H5OH) are present in a 25.0 g solution that contains 0.400 mole

I need help answering this question please:

a. How many grams of ethanol (C2H5OH) are present in a 25.0 g solution that contains 0.400 mole fraction acetone (CH3COCH3)?

b. What mass of cesium chloride (CsCl) must be added to 500. mL of water to produce a 0.400 molkg1 solution? The solution density is dsoln=1.00 gmL1 .

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