MIDTERM+1+Form+A+KEY - of aluminum and the sulfate ion? a)...

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Midterm 1 Exam Form A, Chem. 001 Fall, 2010. (Chapters 2 through 6) Name: _________________________ Date: ____________ 1. Which number listed below has three significant figures? a) 0.02103 b) 1.29000 c) 0.0214 d) 310 2. How many significant figures will the answer to the mathematical operation given below contain? (1.023+ 11.7)(1.14 + 0.193)/140 a) 4 b) 3 c) 5 d) 2 3. 298 K is equivalent to how many ° C? a) 100. ° C b) 25 ° C c) 273 ° C d) 75.2 ° C 4. How many Ba atoms are contained in two formula units of Ba 3 (PO 4 ) 2 ? a) 3 b) 6 c) 2 d) 1 5. How many micro liters are there in 25.7 g of a solution whose density is 0.997 g/mL? a) 0.0258 μ L b) 38.8 μ L c) 25800 μ L d) 0.513 μ L 6. How would you classify the compound formed from the combination of lithium and chlorine? a) molecular b) ionic c) metallic Page 1 of 2
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Midterm 1 Exam Form A, Chem. 001 Fall, 2010. (Chapters 2 through 6) 7. What would be the correct formula of the compound produced from the combination
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Unformatted text preview: of aluminum and the sulfate ion? a) Al 2 S 3 b) Al 3 (SO 4 ) 2 c) Al 2 (SO 4 ) 3 d) Al 2 (SO 3 ) 3 8. Cooking an egg is an example of a a) physical change b) chemical change c) Physical property d) chemical property 9. How many joules of heat energy are needed to raise the temperature of 15.0 g of water from 0.00 C to 85.0 C? The specific heat of H 2 O (l) is 4.184 J/g C. a) 5335 J b) 2092 J c) 4184 J d) 5330 J 10. Uranium has three major isotopes, which are listed in the table below. What is the relative average atomic mass of uranium? Isotopes of Q % Abundance Isotopic Mass 234 U 0.0057 % 234.041 amu 235 U 0.72 % 235.044 amu 238 U 99.27 % 238.051 amu a) 237.903 amu b) 238.019 amu c) 238.051 amu d) 235.082 amu Page 2 of 2...
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MIDTERM+1+Form+A+KEY - of aluminum and the sulfate ion? a)...

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