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104_S10_E1e - CHM104 Spring2010 Exam#1 FORME...

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CHM104 Spring 2010 Exam #1 FORM E 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? 3) 4) The amount of matter in an object is its 4) 5) Which measurement represents the smallest quantity? 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) 46 × 10 - 3 . 6) 7) What temperature is 325 K on the Celsius scale? 7) 8) If 75.0 g of water at 30.0°C absorbs 900 calories, the new temperature will be 8) 1
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