1027 Exam 1 Spring 09

1027 Exam 1 Spring 09 - 1) A good definition of chemistry...

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1) A good definition of chemistry is: A) the science that seeks to understand what matter does by studying what atoms and molecules do. B) the science that seeks to understand what living organisms do by studying the molecules that make up the organism. C) the science that seeks to understand what the universe does by studying interactions of molecules with atoms. D) the science that seeks to understand the interactions of molecules for the sake of advancing human control over nature. E) none of the above 2) The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation. A) 9 1.72 10 m - × B) 10 1.72 10 m - × C) 10 0.172 10 m - × D) 9 1.72 10 m × E) 10 1.72 10 m × 3) How many significant figures should be reported in the answer to the following calculation? (121) x ( 0.86) x ( 4.95687) = A) 2 B) 3 C) 4 D) 5 E) none of the above 4) Determine the answer for the equation below with correct number of significant figures: 3.215 x 13.2 ÷ 0.218 = ________ A) 194.669 B) 195 C) 194.7 D) 194.67 E) none of the above 5) The correct multiplier for the prefix pico is: A) 3 10 - B) 6 10 - C) 9 10 - D) 12 10 - E) none of the above
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6) How many grams are in 7 1.48 10 µg × ? A) 3 1.48 10 × B) 13 1.48 10 × C) 1.48 D) 14.8 E) none of the above 7) How many low dose 81 mg aspirin tablets can be made from 1.21 kg of aspirin? A) 1500 tablets B) 15,000 tablets C) 150,000 tablets D) 1210 tablets E) 12,100 tablets 8) The melting point of antimony was listed in one handbook as 1167.3 o F. Expressed in Kelvins this temperature would be A) 357.6 K B) 496.8 K C) 583.7 K
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This note was uploaded on 09/21/2011 for the course MOSAIC 0852 taught by Professor Raymondhalnon during the Spring '09 term at Temple.

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1027 Exam 1 Spring 09 - 1) A good definition of chemistry...

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