Chemistry, asked by pooj8999, 1 year ago

calculate mole fraction of CH3OH in a solution containing 18g of H20

Answers

Answered by Ravi3311
1
Add up the atomic weights of all the atoms in each molecule to get the molecular weight. 
Take the given weights of methanol and water and convert them into moles. (think of moles as measuring by number of pieces). 
Methanol (MW = 32) = 14.8 g x 1mole/32grams = 0.46 moles 
Water (MW = 18) = 186 g x 1 mole/18grams = 10.33 moles 
The molar fraction of methanol is the moles of methanol/all the moles in the solution. 
0.46 moles methanol/(0.46 moles methanol + 10.33 moles water) = 0.042
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