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Chapter 1: Problem 8
Write the symbol for the following elements. (a) manganese (b) lead (c) gold (d) silver
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The volume of a sphere is \(4 \pi r^{3} / 3\), where \(r\) is the radius. One student measured the radius to be \(4.30 \mathrm{~cm} .\) Another measured the radius to be \(4.33 \mathrm{~cm}\). What is the difference in volume between the two measurements?
Calculate the following to the correct number of significant figures. (a) \(x=128.5+2116.44-2244.47\) (b) \(x=0.004010 \times 2.0000 \times 50054\) (c) \(x=\frac{12.6+0.3+256.5}{1003.7}\) (d) \(x=\frac{12.20-\sqrt{1.60+4(0.36)}}{1.3409}\)
An average adult has \(6.0 \mathrm{~L}\) of blood. The Red Cross usually takes 1 pint of blood from each donor at a donation. What percentage (by volume) of a person's blood does a blood donor give in one donation?
Oil spreads on water to form a film about \(100 \mathrm{~nm}\) thick (two significant figures). How many square kilometers of ocean will be covered by the slick formed when one barrel of oil is spilled (1 barrel \(=31.5\) U.S. gal)?
The following data refer to the compound water. Classify each as a chemical or a physical property. (a) It is a colorless liquid at \(25^{\circ} \mathrm{C}\) and \(1 \mathrm{~atm}\). (b) It reacts with sodium to form hydrogen gas as one of the products. (c) Its melting point is \(0^{\circ} \mathrm{C}\). (d) It is insoluble in carbon tetrachloride.
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