121midterm1sample

# 121midterm1sample - &lt;?xml version=&quot;1.0&quot;...

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1. (5 pts) Which of the following is NOT represented to four significant figures? a) 1001 b) 1.001 x 10 3 c) 10.01 d) 0.1001 e) 0.0001 2. (5 pts) _______significant figures should be retained in the result of the following calculation. (11.13 -2.6) x 10 4 (103.05 + 16.9) x 10 -6 a) 1 b) 2 c) 3 d) 4 e) 5 3.( 5 pts) Which of the following is the lowest temperature? a) -4 o F b) -25 o C c) 250 K 4. (5 pts) Which of the following list those properties of sulfur that can be described as chemical properties? A. Its melting point is 112 o C B. It is a yellow solid C. It reacts with hydrogen to form a gas D. Its density is 2.97 g/cm 3 E. It combines with oxygen a) C,E b) A,B c) A,D d) A,B,D e) B,D 1

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5. (5 pts) The density of silver is 10.5 g/cm 3 . What volume, in cm 3 , would be occupied by a piece of silver with a mass of 61.3 g? a) 0.171 b) 644 c) 10.5 d) 1.55 x 10 -3 e) 5.84 6. (7 pts) Our hybrid car averages 55 miles per gallon. What will this be in kilometers per liter? (1 mile = 5280 ft; 1 inch =2.54 cm; 1 gal = 3.784 L) a) 1.6 x 10 2 b) 1.8 x 10 c) 23 d) 1.2 e) 5.5 x 10 3 7. (5 pts) Which one of the following is not an SI unit? a) Ampere b) Candela c) Liter d) Kilogram e) Meter 2
8. (5 pts). Which one of the following statements concerning 52 24 Cr 3+ is correct? a) It has 24 protons and 24 electrons b) It has 24 protons and 24 neutrons c) It has 21 electrons and 24 neutrons d) It has 24 protons and 21 electrons e) It has 28 neutrons and 24 electrons 9. (5pts) The elements in Group 1A, Group 2A and Group 7A are respectively called: a) alkali metals, alkaline earth metals and halogens b) alkaline earth metals, alkali metals and halogens c) alkali metals, alkaline metals and chalcogens d) lanthanides, alkaline metals and noble gases e) halogens, alkali metals and alkaline earth metals 10. (5 pts) Which of the following elements would you expect to show the greatest similarity in physical and chemical properties: Li, Be, F, S, Cl? a) Li and Be

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## 121midterm1sample - &lt;?xml version=&quot;1.0&quot;...

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