Chemistry 201 (Eikey)

Part 1: MULTIPLE CHOICE (48 points). Choose the one alternative that best completes the statement or answers the question. Record your answer on the scantron. Each question is worth 3 points. 1) A student weighed 30.00 µg of sulfur in the lab. This is the same mass as A) 3.000 × 10 4 ng. B) 3.000 × 10 -5 mg. C) 3.000 × 10 -8 g. D) 3.000 × 10 -5 kg. 2) 1)

2) A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.79 g/mL, 1.81 g/mL, 1.80 g/mL, 1.81 g/mL. If the actual value for the density of the sugar solution is 1.80 g/mL, which statement below best describes her results? A) Her results are neither precise nor accurate. B) Her results are precise, but not accurate. C) Her results are accurate, but not precise. D) Her results are both precise and accurate E) It isn't possible to determine with the information given. 3) A person weighs 77.1 kg. What is his weight in pounds? A) 35.0 pounds B) 154 pounds C) 170 pounds

3) D) 162 pounds 4)

4) The density of air under ordinary conditions at 25°C is 1.19 g/L. How many kilograms of air are in a room that measures 11.0 ft × 11.0 ft and has an 10.0 ft ceiling? 1 in. = 2.54 cm (exactly); 1 L = 103 cm3 A) 0.152 B) 0.0962 C) 40.8 D) 4.08 × 104 E) 3.66

5) Which of the following are examples of intensive properties? A) volume B) density C) mass D) None of the above are examples of intensive properties. E) All of the above are examples of intensive properties. 6) Write the formula for strontium nitride. A) Sr(NO2)2 B) Sr(NO3)2 C) Sr3N2 D) SrN E) Sr2N3

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7) What species is represented by the following information? p+ = 17 A) Cl n° = 18 e- = 18 B) Kr C) Ar+ D) ClE) Ar

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8) Write the name for Sn(SO4)2. A) tin (II) sulﬁte B) tin (IV) sulfate C) tin (I) sulﬁte D) tin sulﬁde E) tin (I) sulfate 9) Write the name for Ca3(PO4)2. A) tricalcium