an unknown weighs 12.924 grams. this unknown Is put into a 100.00 ml flask that
ID: 572341 • Letter: A
Question
an unknown weighs 12.924 grams. this unknown Is put into a 100.00 ml flask that weighs 35.9325 grams and then water is added to the calibration mark. the unknown, the flask, and the added water weigh 140.8321g. what is the density of the unknown assuming that the density of the water is 0.998203 g /ml an unknown weighs 12.924 grams. this unknown Is put into a 100.00 ml flask that weighs 35.9325 grams and then water is added to the calibration mark. the unknown, the flask, and the added water weigh 140.8321g. what is the density of the unknown assuming that the density of the water is 0.998203 g /mlExplanation / Answer
Mass of empty flask + Mass of unknown + Mass of water = 140.8321g
35.9325 + 12.924 + Mass of water = 140.8321
Mass of water = 140.8321 - 35.9325 - 12.924 = 91.9756 grams
Density of Water = Mass of water/Volume of water
Volume of water = Mass of water/Density of water = 91.9756/0.998203 = 92.1411 mL
Total volume of flask = volume of water + Volume of unknown
100 = 92.1411 + Volume of unknown
Volume of unknown = 7.8588 mL
Density of unknown = Mass of unknown/Volume of unknown = 12.924/7.8588 = 1.6445 g/mL or 1.6445 g/cm^3
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