What is the weight percent of a caffeine solution made by dissolving 6.35 g of caffeine,C₈H₁₀N₄O₂,in 75 g of benzene,C₆H₆? A) 0.078% B) 0.085% C) 7.8% D) 8.5% E) 0.80%

Question

Quizplus · Accepted Answer

To find the weight percent of the caffeine solution, we need to divide the weight of the caffeine by the total weight of the solution and then multiply by 100:

Weight percent = (weight of caffeine / total weight) x 100

Weight of caffeine = 6.35 g
Total weight of solution = 6.35 g + 75 g = 81.35 g

Weight percent = (6.35 g / 81.35 g) x 100 = 7.8%

Therefore, the weight percent of the caffeine solution is 7.8%, so the best choice is C).

What Is the Weight Percent of a Caffeine Solution Made