Question

The mass percentage of glucose in acetonitrile when 6 g of glucose is dissolved in 294 g of acetonitrile is:

• A. 6%
• B. 10%
• C. 8%
• D. 4%
• E. 2%

Hint:

Mass percentage is calculated by dividing the mass of the solute by the total mass of the solution.

Answer 1

Answer: (E)

Mass percentage is calculated as: \[ {Mass percentage of glucose} = \frac{{mass of glucose}}{{mass of solution}} \times 100 \] The total mass of the solution is: \[ {Mass of solution} = 6\, {g} + 294\, {g} = 300\, {g} \] Thus, the mass percentage of glucose is: \[ {Mass percentage of glucose} = \frac{6}{300} \times 100 = 2\% \]