QuizOneKey - Dr Grandinetti Chemistry 121 Wednesday Spring...

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Unformatted text preview: Dr. Grandinetti Chemistry 121 Wednesday Spring Quarter 2007 April 4, 2007 Quiz 1 Name 14 E'- Y Rec. Instr. Two—Digit Section No. Lab. Instr. 1. [6 points] Circle each of processes below where a chemical change occurs. An egg being fried Alcohol being distilled Snow melting 11' A Tree burning ) i: A battery discharging ) A piece of iron rusting 2. [4 points] How many significant figures are there in the following numbers? 101.1010 g/crn3 T} 4.03 X 10*1 meters 3 0.0100 X 105 parsecs g 400.0 ounces 4 3. [10 points] A brand of cigarettes contains 0.015 g of tar per cigarette. If a person smokes 20 cigarettes each day, how many milligrams of tar are inhaled in 30 days? Give answer with correct number of significant figures. 0.06 +0» 20 mama’s” 300W“ 3‘ W C 010113 ifigre'fifi 4. [10 points] How many grams of platium are there in a bar of platium 20.0 cm by 10.0 cm by 10.0 cm? The density of platium 21.4 g / cm3. Give answer with correct number of significant figures. (10.0 cm} ( 113.0me (\0-0 (m3 21.5% CM Dr. Grandinetti Chemistry 121 Friday Spring Quarter 2007 April 6, 2007 Quiz 1 Name ¥ E Y Rec. Instr. TwomDigit Section No. Lab. Instr. 1. [2 points] Is wood a pure substance? No 2. [8 points] How many significant figures are there in the following numbers? 0.4532 g/crr13 Ll- 1.0745 x 10-1 meters 3’ 1.7450 X 105 anecs 1.7000 oun :es .... p s 5 ( E: 3. [6 points] Calculate the following to the correct number of significant figures. (0847—0840)><(42.8+1.75)= (0,004+ 7< L4 55 : O guggo _— L+ *— I \o.3 4. [7 points] 1.00 cubic millimeter of oil spread out on water forms a film which covers an area of 1.00 1112. What is the thickness of the oil film in A units? (Recall 1 A: 10—10 m.) Give answer with correct number of significant figures. \I Oh me : Area 7: Th} g.\<.~e.s.s TR;£\ANW. — \l°\-l""“e- ,. \rOO (“MB uh. Arab 5. [7 points] From the beginning of time to 1970 the world production of gold, density 19.3 g/mL, has been estimated to be approximately two billion (2.0 X 109) ounces, (one ounce is 28.349523 g). Assuming that all this gold is packed together in a cube, what would be the approximate length of a side of the cube in meters. Give answer with correct number of significant figures. 2-O7K'DQOUMCS}1335409236 ‘ ECM3 _ : 2 013:}?!ij xnoq my? mama “1'38 -— {WW LoA-J US! can l/lithSl‘hl-fi \la\we .5 (the; (Wham or? side): nil/”H '13 3 :30 remix 5’s- 51.12.: C2.Q34—F-F}H7Lioqc.m3) =‘l,’~f 7ND Cm ...
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