MidtermIAu03Solutions - 1 Which statement is incorrect a...

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1. Which statement is incorrect ? a) Mass is the quantity of matter in an object. b) Physical properties are characteristics that can be determined without causing a change in composition of the structure. c) Solutions are homogeneous mixtures. d) Composition identifies what matter is made of and how much of each component is present e) A theory is an idea or model that has been disproven . 2. The best way to determine whether a sample of a clear, colorless liquid is methanol would be to ________________. a) weigh it. b) determine its boiling point. c) dissolve it in water. d) burn it. e) taste it. 3. Benzene has a melting point of 5.5 o C and a boiling point of 80.1 o C. In what state does benzene exist at 10 o C? a) a solid b) a liquid c) a gas d) a solution 4. Do the indicated arithmetic and give the answer to the correct number of significant figures. (52.70 – 0.359) x 28.4332 a) 1.5 x 10 4 52.70 b) 1.5 x 10 3 - 0.359 c) 1.49 x 10 3 52.34 = 4 sig. fig. d) 1.488 x 10 3 e) 1.4882 x 10 3 5. Which of the following is not true of nonmetals? a) They exist in a variety of colors. b) They are bad conductors. c) They are malleable and ductile. d) Many of them are a gas at room temperature. 1
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6. Consider the data obtained for the length of an object as measured by three students. The length is known to be 14.54 cm. Which of the conclusions summarizes the data? Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Average Student A 14.3 14.4 14.5 14.3 14.5 14.4 Student B 14.7 14.2 14.6 14.5 14.8 14.56 Student C 14.8 14.1 14.5 14.6
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MidtermIAu03Solutions - 1 Which statement is incorrect a...

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