104_S10_E1c - CHM104 Spring2010 Exam#1 FORMC

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CHM104 Spring 2010 Exam #1 FORM C MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Malic acid, a compound used to increase the acidity of fruit - flavored products, freezes at 128°C and boils at 150°C. What is its phase at 100°C, a temperature used in food processing applications? A) liquid B) gas C) solid D) a mixture of solid and liquid E) a mixture of liquid and gas 1) 2) Which element is not essential for human life? A) Pb B) C C) P D) Ca E) H 2) 3) When the prefix centi is used in the metric system, a fundamental unit of measurement is multiplied by what factor? A) 10 - 6 B) 10 - 2 C) 10 - 3 D) 10 6 E) 10 3 3) 4) The amount of matter in an object is its A) mass. B) specific gravity. C) weight. D) volume. E) density. 4) 5) Which measurement represents the smallest quantity? A) 2.95 × 10 - 6 kg B) 2.95 × 10 - 4 g C) 2.95 × 10 3 μ g D) 2950 ng E) 29.5 mg 5) 6) In scientific notation, the number 0.0046 is expressed as A) 46 × 10 - 1 . B) 4.6 × 10 - 3 . C) 4.6 × 10 - 1 . D) 4.6 × 10 - 2 .E ) 4 6 × 10 - 3 . 6) 7) What temperature is 325 K on the Celsius scale? A) 52°C B) 344°C C) 598°C D) 126°C E) 617°C 7) 8) If 75.0 g of water at 30.0°C absorbs 900 calories, the new temperature will be A) 160°C. B) 42.0°C. C) 18.0°C D) 22.0°C. E) 105°C. 8) 9) Calculate the density of cyclohexane if a 50.0 g sample has a volume of 64.3 mL. A) 114.3 g/mL B) 1.29 g/mL C) 0.322 g/mL D) 14.3 g/mL E) 0.778 g/mL 9) 1
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10) Which characteristics correctly describe a neutron?
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104_S10_E1c - CHM104 Spring2010 Exam#1 FORMC

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