Chapter 1: Problem 9
Write the name of the element represented by the following symbols. (a) \(\mathrm{Hg}\) (b) Si (c) \(\mathrm{Na}\) (d) I
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Which of the following statements use only exact numbers? (a) The temperature in our dorm room is kept at \(72^{\circ} \mathrm{F}\). (b) I bought 6 eggs, 2 cookies, and 5 tomatoes at the farmers' market. (c) There are \(1 \times 10^{9}\) nanometers in 1 meter.
Classify each of the following as element, compound, of mixture. (a) gold (b) milk (c) sugar (d) vinaigrette dressing with herbs
Express the following in scientific notation: (a) \(132.5 \mathrm{~cm}\) (b) \(0.000883 \mathrm{~km}\) (c) \(6,432,000,000 \mathrm{nm}\)
Classify the following as solution or heterogeneous mixture. (a) normal urine (b) gasoline (c) batter for chocolate chip cookies
Label each of the properties of iodine as intensive (I) or extensive \((\mathrm{E})\). (a) Its density is \(4.93 \mathrm{~g} / \mathrm{mL}\). (b) It is purple. (c) It melts at \(114^{\circ} \mathrm{C}\). (d) One hundred grams of melted iodine has a volume of \(122 \mathrm{~mL}\) (e) Some iodine crystals are large.
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