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Assume that identical hydrometers are placed in ethanol (sp gr 0.7893) and in chloroform (sp gr 1.4832). In which liquid will the hydrometer float higher? Explain.
1. Matter and Measurements
Specific Gravity
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What is the specific gravity of lithium metal (in g/mL) at 10.0ºC if a cube measures 0.82 cm x 1.45 cm x 1.25 cm and has a mass of 0.794 g?
A
0.55
B
0.504
C
0.53
D
1.87
Verified step by step guidance1
Calculate the volume of the lithium metal cube by multiplying its dimensions: Volume = 0.82 \text{ cm} \times 1.45 \text{ cm} \times 1.25 \text{ cm}.
Determine the density of the lithium metal by using the formula: Density = \frac{\text{mass}}{\text{volume}}. Use the mass given as 0.794 g and the volume calculated in the previous step.
Recall that specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water at 4ºC, which has a density of 1 g/mL.
Since the density of water is 1 g/mL, the specific gravity of the lithium metal is numerically equal to its density in g/mL.
Use the density calculated in step 2 to express the specific gravity of lithium metal at 10.0ºC.
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