To determine density one needs to measure the mass and volume of an object. Mass
ID: 1006668 • Letter: T
Question
To determine density one needs to measure the mass and volume of an object. Mass is easily measured on a balance. If the object is insoluble in water, its volume can be determined by submerging in water and measuring the apparent increase in volume of the water. The difference between the initial volume and the volume after the object is added is the volume of the object. A quartz crystal has a mass of 152.36 g. A volumetric cylinder contains 41.62 mL of water. When the quartz crystal is submerged in the water the apparent volume is 98.9 mL. What is the density of quartz? Give your answer to the correct number of sig. figs. and include units.
Explanation / Answer
Initial volume of water is 41.62ml
Final volume of water is 98.9ml
volume of quartz is = final volume - initial volume
= 98.9-41.62 = 57.28ml
mass of quartz is 152.36g
density of quartz = mass of quartz/volume of quatz
= 152.36/57.62 = 2.64g/ml >>>> answer three signeficant figures
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