Question

g Calculate the moles of methanol in a first distillate that has a total volume of 0.5 mL and contains 23.4% methanol. The density of methanol is 0.791 g/mL, and the molar weight of methanol is 32.04 g/mol. 2.9 x10-3 mol Methanol 9.3 x10-3 mol Methanol 1.17 x 10-2 mol Methanol None of the above

Answer 1

Answer:

2.9 × 10⁻³ mol

Explanation:

Step 1: Calculate the volume of methanol

0.5 mL of distillate contains 23.4% methanol.

0.5 mL × 23.4% = 0.117 mL

Step 2: Calculate the mass corresponding to 0.117 mL of methanol

The density of methanol is 0.791 g/mL.

0.117 mL × 0.791 g/mL = 0.0925 g

Step 3: Calculate the moles corresponding to 0.0925 g of methanol

The molar weight of methanol is 32.04 g/mol.

0.0925 g × 1 mol/32.04 g ≈ 2.9 × 10⁻³ mol