🤓 Based on our data, we think this question is relevant for Professor Bindell's class at UCF.
We are asked to calculate the mass percent, mole fraction, molality, and molarity of the pentane.
Step 1. Calculate mass of each
Step 2. Calculate moles each
Molar mass C5H12 = 72.17 g/mol
Molar mass C6H14 = 86.20 g/mol
Step 3. Mass percent pentane
Mass % C5H12 = 34.65 %
A solution is prepared by mixing 25 mL pentane (C5H12, d = 0.63 g/cm3) with 45 mL hexane (C6H14, d = 0.66 g/cm3). Assuming that the volumes add on mixing, calculate the mass percent, mole fraction, molality, and molarity of the pentane.