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# chemistry: an experiment requires 15.0 g of cyclohexane, whose density is 25.0 degrees celcius is 0.7781g/ml. What volume of cyclohexane should be used?

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After a label fell off a bottle containing a clear liquid which is believed to be benzene, a chemist measured the density of the liquid to verify its identity. A 25.0 ml portion of the liquid had a mass of 21.95g. A chemistry handbook lists the density of benzene at 15 degrees celcius 0.8787g/ml. Is the calculated density in agreement with the tabulated value?
b) An experiment requires 15.0 g of cyclohexane, whose density is 25.0 degrees celcius is 0.7781g/ml. What volume of cyclohexane should be used?
c) A spherical ball of lead has a diameter of 5.0cm. What is the mass of the sphere if lead has a density of 11.34g/cm^3? (the volume of the sphere 4/3pir^3)

A 32.65 g sample of solid is placed in a flask. Toulene, in which the solid is insoluble, is added to the flask so that the volume of solid and liquid together is 50.00ml. The solid and toulene together weigh 58.58g. The density of toulene at the temperature of the experiment is 0.864g/ml. What is the density of the solid?

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#### Solution Preview

abbreviations; cc = cubic centimeters; V = volume; g = grams; d = density

a. density = mass/volume = 21.95/25 = 0.878 g/cc. So the density is in agreement with ...

#### Solution Summary

The volume of cyclohexane should be used is determined.

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