eng-spring07-q201

eng-spring07-q201 - 1.0000 g 1.3110 g Which statement best...

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CHEM 151: Quiz 1 NAME ___________________________ ID #_______________ Show your work for full credit Eng Q201 1. (4 pts) All of the following are examples of physical properties EXCEPT a) gold is yellow in appearance. b) aluminum oxidizes (that is, it reacts with oxygen) to form Al 2 O 3 . c) mercury is a liquid at room temperature. d) the density of silver is 10.45 g/cm 3 . 2. (4 pts) Which one of the following is a homogeneous mixture? a) baked beans b) sugar dissolved in water c) chocolate chip ice cream d) chicken noodle soup 3. (4 pts) Which one of the following is NOT an SI base unit? a) minutes b) kilogram c) mole d) all are SI base units 4. (4 pts) Two electronic balances are tested using a standard weight. The true mass of the standard is 1.3111 g. The results of 5 individual measurements on each balance are recorded below. Balance A Balance B 0.8888 g 1.3110 g 0.9959 g 1.3109 g 1.1182 g 1.3111 g 1.0033 g 1.3110 g 0.9938 g 1.3110 g average mass =
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Unformatted text preview: 1.0000 g 1.3110 g Which statement best describes the results? a) A: good precision, good accuracy. B: good precision, good accuracy. b) A: good precision, good accuracy. B: poor precision, poor accuracy. c) A: poor precision, good accuracy. B: good precision, good accuracy. d) A: poor precision, poor accuracy. B: good precision, good accuracy. 5. (4 pts) When 24 copper pennies are submerged in water, the pennies displace 8.26 cm 3 of water. If the combined mass of the pennies is 73.86 g, what is the density of copper? a) 0.112 g/cm 3 b) 1.34 g/cm 3 c) 8.94 g/cm 3 d) 32.8 g/cm 3 6. (5 pts) For the following, determine the proper answer with the correct number of significant figures and the correct units. ( ) 66262 10 16726 10 2 40 10 1000 1 34 2 2 24 8 . . . *--kg m s s g m s g kg Bonus (2 pts) Give the name or symbol for the following: In __________________________ barium __________________________...
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