A calibrated flask was filled to the 25.00 mL mark with ethyl alcohol. By weighi
ID: 502957 • Letter: A
Question
A calibrated flask was filled to the 25.00 mL mark with ethyl alcohol. By weighing the flask before and after adding the alcohol, it was determined that the flask contained 19.7325 gof alcohol. In a second experiment, 25.1830 g of metal beads were added to the flask, and the flask was again filled to the 25.00 mL mark with ethyl alcohol. The total mass of the metal plus alcohol in the flask was determined to be 38.9514 g .
Part A
What is the density of the metal in g/mL?
A calibrated flask was filled to the 25.00 mL mark with ethyl alcohol. By weighing the flask before and after adding the alcohol, it was determined that the flask contained 19.7325 gof alcohol. In a second experiment, 25.1830 g of metal beads were added to the flask, and the flask was again filled to the 25.00 mL mark with ethyl alcohol. The total mass of the metal plus alcohol in the flask was determined to be 38.9514 g .
Part A
What is the density of the metal in g/mL?
= g/mLExplanation / Answer
Alcohol density = 19.7325 /25 = 0.7893 g / mL
Mass of alcohol in the flask filled with beads, ma = 38.9514 - 25.1830 = 13.7684 g
That mass of alcohol will occupy = 13.7684 / 0.7893 = 17.4438 mL
That leaaves (25 - 17.4438) = 7.5562 mL of volume left for the beads
Therefore, Bead density = 25.1830 / 7.5662 = 3.3327 g/mL
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