A student is trying to determine whether a solvent is benzene(0.877g/cm3) or acetone (density 0.785g/cm3) measures out 26mL of a liquid solvent in a 50mL graduated cylinder that has ±1mL error. The mass of the
liquid sample is 20.972g. Assuming that the balance has only a 0.001g error.
a. Using the uncertainty in the volume, calculate the possible range of masses of the solvent. You
should have a high and a low mass for each solvent.
b. Which solvent is present? Explain
6. When 136.62g of pure copper reacts with 610.05g of iodine, 682.29g of a light brown compound containing
only copper and iodine result. 64.38g of iodine remain when the reaction is complete.
a. Do these results support the Law of Conservation of Mass? Explain
b. Another student heats 68.58 of copper with 112.94g of iodine. The product is a white compound with
mass of 169.50g with 12.03g of copper left over. Since the two products look different, they are
different compounds. Prove that these two experiments together support the Law of multiple
proportions.
3. Bowling balls are carefully made. Each has an exact diameter of 8.500in. A typical bowling ball weighs
about 14.5 pounds.
a. Convert the weight to mass and report it in grams.
b. Convert the diameter to centimeters and then calculate the volume of a bowling ball.
c. Report the density of a bowling ball in g/cm3 with the correct number of significant figures based
on the values given for mass and volume.