Density: How many grams of ethanol (density 0.80 g/cm3) should be added to 5.0 g of chloroform (density 1.5 g/cm3) if the resulting mixture is to have a density of 1.2 g/cm3? Assume that the fluids do not change their volumes when they are mixed.
A. 2.0 g
B. 2.4 g
C. 1.8 g
D. 4.4 g
E. 1.6 g
Answer: A
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How small is the Planck length, the smallest unit of the fabric of space itself.
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