Answer:
Mole fraction of acetyl bromide → 0.52
Explanation:
To determine the mole fraction, we must need to convert the mass to moles.
Mole fraction = Moles of solute or solvent / Total moles
Moles of acetyl bromide = 24 g / 122.9 g/mol = 0.195 moles
Moles of heptane = 18 g /100 g/mol = 0.18 moles
Total moles = moles of heptane + moles of acetyl bromide
0.18 + 0.195 = 0.375 → Total moles
Mole fraction of acetyl bromide = 0.195 / 0.375 = 0.52
Answer:
The mol fraction of acetyl bromide is 0.52
Explanation:
Step 1: Data given
Mass acetyl bromide = 24.0 grams
Molar mass of acetyl bromide = 122.95 g/mol
Mass of heptane = 18.0 grams
Molar mass of heptane =100.21 g/mol
Step 2: Calculate moles
Moles = mass / molar mass
Moles acetyl bromide = mass acetyl bromide / molar mass acetyl bromide
Moles acetyl bromide = 24.0 grams / 122.95 g/mol
Moles acetyl bromide = 0.195 moles
Moles heptane = 18.0 grams / 100.21 g/mol
Moles heptane = 0.180 moles
Step 3: Calculate total moles
Total moles = 0.195 moles + 0.180 moles
Total moles = 0.375 moles
Step 4: Calculate mol fraction of acetyl bromide
Mol fraction acetyl bromide = moles acetyl bromide / total moles
Mol fraction acetyl bromide = 0.195 moles / 0.375 moles
Mol fraction acetyl bromide = 0.52
The mol fraction of acetyl bromide is 0.52
