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121midterm1 -

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1. (5 pts) What type of quantity do the following units indicate: mL; ps; nm? a) volume; time; length b) area; time; volume c) density; time; temperature d) time; volume; length e) area; length; time 2.(5 pts) Which one of the following is an extensive property? a) volume b) length c) temperature d) density 3. (5 pts) Which one of the following is a chemical property? a) flammability b) density c) color d) melting point e) boiling point 4. (5 pts) How many liters of wine can be held in a wine barrel whose capacity is 26.0 gal? 1 gal = 4 qt = 3.7854 L a) 1.46 x 10 -4 b) 0.146 c) 98.4 d) 6.87 x 10 3 e) 6.87 1
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5.(7 pts) If a migrating loon flies at an average speed of 14 m/s, what is its average speed in miles/hr? (1 km = 0.621 miles) a) 22.5 b) 23 c) 31.2 d) 31 e) 8.7 6. (7 pts) Gold can be hammered into extremely thin sheets, called gold leaf. If a 200 mg piece of gold (density = 19.32 g/cm 3 ) is hammered into a sheet measuring 2.4 ft x 1.0 ft, calculate the average thickness of the sheet in nanometers (nm). 1 ft = 12 in; 1in = 2.54 cm. ( Hint: thickness = volume ) area a) 46 b) 4.6 c) 460 d) 4.600 x 10 2 e) 0.46 2
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7. (5 pts) Which of the following is the coldest temperature: a) -10 o C b) 9 o F c) 260 K 8. (5 pts) Which one of the following is not an SI unit? a) ampere b) liter c) kilogram d) candela e) meter 9. (7pts). 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 3
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10. (5 pts) There are _____ electrons, _______ protons, and ______ neutrons in 13 2 Xe. a) 132, 132, 54 b) 54, 54, 132 c) 78, 78, 54 d) 54, 54, 78 e) 78, 78, 132 11. (5 pts) 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 12. (5 pts) Which of the following elements would you expect to show the greatest
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This note was uploaded on 05/14/2009 for the course CHEM 121 taught by Professor Wyzlouzil during the Fall '07 term at Ohio State.

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121midterm1 -

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