Multiple Choice
A 39.0 g piece of aluminum metal has a volume of 14.4 cm3. Calculate the apparent weight of the piece of metal when it is immersed in chloroform. Density of chloroform at 25 °C is 1.49 g/cm3.
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An empty container weighing 73.190 g is filled with an unknown liquid and the combined mass is recorded as 87.308 g. The container was then emptied and filled with water and recorded a new mass of 88.442 g at a temperature of 19 oC. (d = 1.0027 g/mL). Calculate the density of the unknown liquid.
A
0.92861 g/mL
B
0.92565 g/mL
C
0.92815 g/mL
D
0.93000 g/mL
Verified step by step guidance1
Determine the mass of the unknown liquid by subtracting the mass of the empty container from the combined mass of the container and the unknown liquid: 87.308 g - 73.190 g.
Calculate the mass of the water by subtracting the mass of the empty container from the mass of the container filled with water: 88.442 g - 73.190 g.
Use the density of water at 19°C (1.0027 g/mL) to find the volume of the water. Divide the mass of the water by the density of water: mass of water / 1.0027 g/mL.
Assume the volume of the unknown liquid is the same as the volume of the water, since the container is filled to the same level. Use the volume calculated in the previous step.
Calculate the density of the unknown liquid by dividing the mass of the unknown liquid by the volume of the liquid: mass of unknown liquid / volume of liquid.
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