the percentage of water by mass is 54%in a mixture of ethenol and water . the mole fraction of water in this solutions is?
Answers
Explanation:
54% of the whole solution is water this shows that 54 grams of water is present if there is 100grams of solution
hence now divide 54 by 18 which is the molar mass of water you will get the number of moles which is equal to 3. therefore there are 3 moles of water in the solution .similarly subtract 54 from 100 and you will get the amount of Ethanol in it once you get the amount of Ethanol divided by the molar mass of ethanol you will get the number of moles of ethanol once you get the number of moles of Ethanol find the molar ratio of water and ethanol individually were the formula
Answer:
0.75
Explanation:
moles of water=54/18=3moles
percentage of ethanol is 100-54=46
moles of ethanol =46/46=1moles
mole fraction=3/3+1
= 3/4
=0.75 moles