Chapter 1: Problem 8
Write the symbol for the following elements. (a) copper (b) carbon (c) bromine (d) aluminum
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A pycnometer is a device used to measure density. It weighs 20.455 g empty and 31.486 g when filled with water \(\left(d=1.00 \mathrm{~g} / \mathrm{cm}^{3}\right) .\) Pieces of an alloy are put into the empty, dry pycnometer. The mass of the alloy and pycnometer is \(28.695 \mathrm{~g} .\) Water is added to the alloy to exactly fill the pycnometer. The mass of the pycnometer, water, and alloy is \(38.689 \mathrm{~g}\). What is the density of the alloy?
What is the difference between (a) mass and density? (b) an extensive and an intensive property? (c) a solvent and a solution?
Write the name of the element represented by the following symbols: (a) \(\mathrm{Mn}\) (b) \(\mathrm{Au}\) (c) \(\mathrm{Pb}\) (d) \(\mathrm{Ag}\)
Express the following in scientific notation: (a) \(132.5 \mathrm{~cm}\) (b) \(0.000883 \mathrm{~km}\) (c) \(6,432,000,000 \mathrm{nm}\)
Which of the following statements use only exact numbers? (a) The little boy weighs 74.3 lbs. (b) The boiling point of ethanol is \(78^{\circ} \mathrm{C}\). (c) The mailman delivered 3 letters, 2 postcards and one magazine.
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