CHEM 101 Final Ivy Tech exam questions with answers

CHEM 101 Final Ivy Tech exam questions |\ |\ |\ |\ |\ |\ |\




with answers |\




What is the definition of a scientific theory? - CORRECT
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ANSWERS ✔✔a model that explains the underlying |\ |\ |\ |\ |\ |\ |\



reasons for observations and laws |\ |\ |\ |\




What term best describes a brief statement that
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summarizes many past observations and predicts new |\ |\ |\ |\ |\ |\ |\



ones? - CORRECT ANSWERS ✔✔scientific law
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Which of the following is an example of a scientific law? -
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CORRECT ANSWERS ✔✔In a chemical reaction, matter is |\ |\ |\ |\ |\ |\ |\ |\



neither created nor destroyed. |\ |\ |\




Which of the following would be considered a theory? -
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CORRECT ANSWERS ✔✔Helium balloons float because |\ |\ |\ |\ |\ |\



helium is less dense than air. |\ |\ |\ |\ |\




The key to success in chemistry is: - CORRECT ANSWERS
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✔✔all of the above |\ |\ |\




A plastic block has dimensions of 2.2 cm x 3.0 cm x 1.5
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cm and a mass of 12.4 grams. Will the block float in water
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,and why? - CORRECT ANSWERS ✔✔No, because the
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density of the block is 1.3 g/mL which is greater than the
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density of water. |\ |\




Given the density of Au is 19.3 g/cm3, determine the
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mass of gold (in grams) in an ingot with the dimensions of
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10.0 in x 4.00 in x 3.00 in. - CORRECT ANSWERS ✔✔3.80
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x 104|\




The distance between the two hydrogen atoms in a
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molecule of water is 0.000000000172 m. Express this
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distance in scientific notation. - CORRECT ANSWERS
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✔✔1.72 x 10-10 m |\ |\ |\




How many grams are in 1.48 x 107 μg? - CORRECT
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ANSWERS ✔✔14.8 |\




The correct decimal representation of 6.453 x 103 is: -
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CORRECT ANSWERS ✔✔6,453 |\ |\




How many significant digits should be reported in the
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answer to the following question?
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(4.3-3.7) x 12.3= - CORRECT ANSWERS ✔✔1 |\ |\ |\ |\ |\ |\

, The correct scientific notation for the number 0.00050210
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is: - CORRECT ANSWERS ✔✔5.0210 x 10-4
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Which measurement below represents the heaviest
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mass? - CORRECT ANSWERS ✔✔1 Mg |\ |\ |\ |\ |\




Determine the answer to the following equation with |\ |\ |\ |\ |\ |\ |\ |\



correct number of significant figures:
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2.02+8.102-0.0297= - CORRECT ANSWERS ✔✔10.09 |\ |\ |\ |\




A lead ball has a mass of 55.0 grams and a density of
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11.4 g/cm3. What is the volume of the ball? - CORRECT
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ANSWERS ✔✔4.82 mL |\ |\




When the value 4.449 is rounded to two significant
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figures, the number should be reported as: - CORRECT
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ANSWERS ✔✔4.4 |\




The correct number of significant figures in the number
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865,000 is: - CORRECT ANSWERS ✔✔ambiguous |\ |\ |\ |\ |\




How many inches are in 2.80 ft? - CORRECT ANSWERS
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✔✔33.6