Chemistry: Molecular Nature of Matter and Change, 6th Edition (Silberberg)

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1			Which of the following is a physical change?
			A)	milk turning sour
			B)	battery cables corroding
			C)	sugar turning brown when heated
			D)	liquid water being cooled and forming ice
			E)	an egg being hard-boiled
2			Which of the following does not result in an increase in the potential energy of the object involved?
			A)	air being pumped into a bicycle tire
			B)	water flowing down rapids
			C)	a weight being lifted off the ground
			D)	a roller coaster car moving uphill
			E)	a spring being stretched
3			One of Lavoisier's major contributions to chemistry was his
			A)	discovery of phlogiston.
			B)	explanation of the nature of combustion.
			C)	discovery of mercury.
			D)	invention of the chemical balance.
			E)	invention of the distillation process.
4			Express 450 kg in Mg.
			A)	0.450 Mg
			B)	4.50 Mg
			C)	4.5 x 10-2 Mg
			D)	4.5 x 105 Mg
			E)	4.5 x 108 Mg
5			A small pizza has a diameter of 7.50 inches. Its diameter in centimeters is
			A)	19.1 cm
			B)	10.0 cm
			C)	4.65 cm
			D)	2.95 cm
			E)	0.169 cm
6			Express a distance of 115.5 pm in Å (1Å = 0.1 nm).
			A)	8.6 x 10-3 Å
			B)	0.1155 Å
			C)	1.155 Å
			D)	11.55 Å
			E)	115.5 Å
7			Which of the following is not an S.I. base unit?
			A)	mole
			B)	liter
			C)	kelvin
			D)	second
			E)	ampere
8			The S.I. prefixes tera and milli represent, respectively
			A)	106 and 10-3
			B)	1012 and 103
			C)	10-3 and 1012
			D)	108 and 103
			E)	1012 and 10-3
9			What is the volume occupied by 450 g of gold, if the density of gold is 19.3 g/cm3?
			A)	23.3 cm3
			B)	8685 cm3
			C)	19.3 cm3
			D)	45.0 cm3
			E)	4.29 x 10-2 cm3
10			A bottle can hold 250. g of water but only 89.75 g of ether. What is the density of ether in g/cm3? (The density of water is 1.00 g/cm3.)
			A)	0.359 g/cm3
			B)	2.79 g/cm3
			C)	160.3 g/cm3
			D)	250. g/cm3
			E)	696 g/cm3
11			The freezing point of mercury is -38.0 °F. What is this temperature in degrees Celsius?
			A)	-126 °C
			B)	-21.1 °C
			C)	-68.4 °C
			D)	-38.9 °C
			E)	38.9 °C
12			Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is this temperature in kelvins?
			A)	387.6 K
			B)	355.6 K
			C)	323.6 K
			D)	190.8 K
			E)	-190.8 K
13			How many significant figures are there in 5.0390 g?
			A)	two
			B)	three
			C)	four
			D)	five
			E)	six
14			If a measurement is not very reproducible but close to the actual value it is very _______ but not very ________ .
			A)	accurate, precise.
			B)	precise, accurate.
			C)	random, systematic.
			D)	calibrated, precise.
			E)	systematic, precise.
15			Express 0.0030950 in scientific notation to three significant figures.
			A)	3.10 x 10-3
			B)	0.03 x 10-1
			C)	3.09 x 10-3
			D)	3.095 x 10-3
			E)	3.10 x 103