Final answer:
To find the percent by mass concentration of glucose in the solution, divide the mass of glucose by the total mass of the solution and multiply by 100%. The mass percent is 6.57%.
Step-by-step explanation:
To find the percent by mass concentration of glucose in the solution, we need to determine the mass of glucose and the total mass of the solution. To find the percent by mass concentration of glucose in the solution, divide the mass of glucose by the total mass of the solution and multiply by 100%. The mass percent is 6.57%.
Given that 5.5g of glucose is dissolved in 78.2g of water, the total mass of the solution is 5.5g + 78.2g = 83.7g. The mass percent of glucose in the solution can be calculated using the formula:
Mass percent = (mass of solute / mass of solution) x 100%
Substituting the values, we get:
Mass percent = (5.5g / 83.7g) x 100% = 6.57%