Question

maas of ethanol to be added to 1.0kg water to have the mole fraction of ethanol equal to 0.20 ?​

Answer 1

Answer:

638.89g

Explanation:

0.2=m/46gmol−1)(m/46gmol−1)+(1000g/18gmol−1)

⇒m46g=0.2×100018×10.8=13.89

m=13.89×46g=638.89g