MidTerm1_08_wyslouzil

MidTerm1_08_wyslouzil - 1. (5 pts) You add 0.00015 mol of...

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1 1. (5 pts) You add 0.00015 mol of compound Z (Molecular weight = 54.6) to a crucible that weighs 1.0020 g. The combined weight, reported to the correct number of significant figures, is: a) 1.0 g b) 1.01 g c) 1.01019 g d) 1.010 g e) 1.0102 g 2. (6 pts) A rather large water bath has the dimensions 2.5 m × 2.2 m × 0.20 m. Determine the mass of water, in kilograms, needed to entirely fill the bath. (Density of water = 1 g/cm 3 .) a) 1.1 x 10 6 b) 1.1 x 10 3 c) 2.2 x 10 6 d) 2.2 x 10 3 e) 5.0 x 10 2 3. (5 pts) Accuracy refers to __________. a) how many significant figures a measured number has b) how close a measured number is to the calculated value c) how close a measured number is to other measured numbers d) how close a measured number is to the true value e) how close a measured number is to zero 4. (5 pts) If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) __________. a) heterogeneous mixture b) element c) homogeneous mixture d) compound e) mixture of elements
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2 5. (5 pts) The symbols for copper, chlorine, carbon, and calcium are: a) Co, Cl, Ca, C b) Cu, Cl, C, Ca c) Cu, Cl, Ca, C d) Co, C, Cb, Ka e) Cu, Ch, C, Cl 6. (6 pts) Select the combination of statements which are correct: A. The mass number of an atom is the sum of the number of neutrons and protons in the nucleus. B. The number of neutrons in an atom is its atomic number. C. Isotopes of an element differ only in the number of protons. D. The volume occupied by the nucleus is a small percentage of the total volume. E.
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MidTerm1_08_wyslouzil - 1. (5 pts) You add 0.00015 mol of...

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