Answer:
The mol fraction of heptane in this solution is 0.47
Explanation:
Step 1: Data given
Mass of heptane = 31.00 grams
Molar mass of heptane = 100.21 g/mol
Mass of chloroform = 42.00 grams
Molar mass of chloroform = 119.38 g/mol
Step 2: Calculate moles heptane
moles heptane = 31.00 grams / 100.21 g/mol
moles heptane = 0.309 moles
Step 3: Calculate moles chloroform
moles chloroform = 42.00 grams / 119.38 g/mol
moles chloroform = 0.352 moles
Step 4: Calculate total moles
Total moles = moles heptane + moles chloroform
Total moles = 0.309 moles + 0.352 moles = 0,661 moles
Step 5: Calculate mol fraction of heptane
Mol fraction heptane = moles heptane / total moles
Mol fraction heptane = 0.309 moles / 0.661 moles
Mol fraction heptane = 0.47
The mol fraction of heptane in this solution is 0.47
