Self Assessment A


1	Which of the following is an example of a physical property?
		A)	combustibility
		B)	corrosiveness
		C)	explosiveness
		D)	density
		E)	A and D


2	Which of the following represents the greatest mass?
		A)	2.0 x 10³ mg
		B)	10.0 dg
		C)	0.0010 kg
		D)	1.0 x 10⁶ μm
		E)	3.0 x 10¹² pg


3	Convert 240 K and 468 K to the Celcius scale.
		A)	513 ^oC and 741 ^oC
		B)	-59 ^oC and 351 ^oC
		C)	-18.3 ^oC and 108 ^oC
		D)	-33 ^oC and 195 ^oC


4	Calculate the volume occupied by 4.50 X 10² g of gold (density = 19.3 g/cm³).
		A)	23.3 cm³
		B)	8.69 x 10³ cm
		C)	19.3 cm³
		D)	450 cm³


5	The melting point of bromine is -7 ^oC. What is this melting point expressed in ^oF?
		A)	45 ^oF
		B)	-28 ^oF
		C)	-13 ^oF
		D)	19 ^oF
		E)	None of these is within 3 ^oF of the correct answer.


6	How many significant figures are there in the measurement 3.4080 g?
		A)	6
		B)	5
		C)	4
		D)	3
		E)	2


7	How many significant figures should you report as the sum of 8.3801 + 2.57?
		A)	3
		B)	5
		C)	7
		D)	6
		E)	4


8	Walking fast can consume 5.0 kcal per minute. How many hours of exercise are required to consume 450 kcal, the energy in a large candy bar?
		A)	7.5 hr
		B)	1.25 hr
		C)	1.75 hr
		D)	1.5 hr
		E)	1 hr


9	Together, Americans drive about 5.0 x 10⁹ miles per day, and their cars get an average of 22 miles per gallon of gas used. For each kilogram of gasoline used, about 3 kg of carbon dioxide is produced. How many kilograms of CO₂ are emitted into the atmosphere by cars in the US each day? [1 gal = 3.5 kg]
		A)	2 x 10⁹ kg
		B)	2.4 x 10⁹ kg
		C)	8.3 x 10⁹ kg
		D)	1.6 x 10⁹ kg
		E)	None of the above.


10	A bar of gold is measured with the ruler shown. The length of the bar should be reported as:
		A)	3 cm.
		B)	3.0 cm.
		C)	2.7 cm.
		D)	2 cm.

2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.