Quiz1_219 - \ \ i 1 l i 1'] y Chemistry 101 Section 219...

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Unformatted text preview: \ \ i 1 l i 1'] y Chemistry 101 Section 219 Fall 2007 Quiz #1 VERSION A September 21, 2007 Required: Scantron form 882-E Instructions: Do not open this quiz until instructed to do so. (1)Write your name on your Scantron Form (2)Write Version A in the box for “Test No.” (3)Answer all questions on your Scantron Form (4)When instructed to do so, check to ensure that your quiz has 20 multiple choice questions You may write on this test, but only the Scantron Form will be scored! Answer the questions on your Scantron form. Each question is worth 2 points. Maximum Score: 40 points 1) If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards,how many gallons of paint are needed for the room? (3 ft = 1 yd) A) 7.0 gallons L B) 47 gallons , I I N i I M 1 H C> 24ganons else M- if»; 1‘} 9m» l w ‘1 or D) 21 gallons ' ’9 A; / I} V E) 2.3 gallons ( 5 2) Which of the following represents a chemical property of hydrogen gas? A It is gaseous at room temperature. a) t reacts explosively with oxygen. C) It is colorless. D) It is tasteless. E) it is less dense than air. 3) Calcium belongs to the group of the periodic table. A) transition metal B alkali metal @alkaline earth metal D) halogen E) noble gas 4) What answer should be reported, with the correct number of significant figures, for the following calculation? (433.621 — 333.9) x 11.900 @1.19x10a B) 1.187x103 C)1.1868x103 D)1.1868Ox103 E)1.186799x103 5) Which one of the following statements about the work of the following scientists is incorrect? A) Rutherford’s gold foil experiment challenged the plum pudding model of the atom Thompson’s cathode ray tubes proved the existence of the electron Dalton’s atomic theory accounted for the presence of isotopes ) Millikan’s oil drop experiment measured the charge of the electron E) All of the above statements are correct 6) What element is defined by the following information? p+=11n°=12e-=11 A vanadium sodium C) titanium D) magnesium 7) in the balanced equation for the reaction of aqueous aluminum acetate with aqueous ammonium phosphate to form solid aluminum phosphate and aqueous ammonium acetate, what is the coefficient for ammonium acetate? ) W) “3...; weapons + (NAA)3?OL\“‘> NW4 * BN‘MCZML 5553 01A 8) Which of the following is an example of the law of multiple proportions? A) A sample of chlorine is found to contain three times as much CI-35 as Cl-37. B) Two different samples of table salt are found to have the same ratio of sodium to chlorine. C) Nitrogen dioxide always has a mass ratio of 2.28 g 0: 1 g N. Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 9 0:1 g C and 2.66 9 0:19 C. E) The atomic mass of bromine is found to be 79.90 amu. 9) Which of the following contains the MOST atoms? A) 10.0 g Kr {V‘yufi' \d on can B) ‘0-09 Ne W swam man a Col‘lmamn heft“, C 10.09 Mg ‘ l k ,l x. .7 , @1009 He fie \S lxfihfib’i‘ J 0:, (“0% ammo, To E) 10.0 g Ar ‘ mane u? 10) What is the formula for strontium nitride? A) Sr2N3 B) Sr(N02)2 A7, ’ 5 C N03)2 ) q (D):Sr3N2> Dr 3 Nu, E) r W W 1 1)Write the name for Ca3(PO4)2. A) calcium (lll) phosphite B) calcium phosphite C) tricalcium phosphorustetraoxide D calcium (ll) phosphite calcium phosphate 12) Determine the name for N205. ) nitrogen oxide ) nitrogen tetraoxide ) nitrogen (ll) oxide nitrogen (IV) oxide initrogen pentaoxide UOUJ> a 13) Determine the name for HCIOS. A) hloric acid hydrochloric acid C) perchloric acid D) hydrochlorus acid E) chlorate acid 14) How many N204 molecules are contained in 76.3 g N204? way my, “Wm/AV (“11:3 '5» L2 X \L‘l it} +4 ‘9‘" "I A) 726 X 1023 N204 molecules ‘ \E ;,_ 7K 3 F M) B) X 1025 N204 mo'ch'eS m ot‘ \ l L9 \J 1i i; melxk: ’ /3 C 5.54 x 1025 N204 molecules ' x...) k m a i, x 4.99 x 1023 N204 molecules \\ \ E) 1.38 x 1024 N204 molecules $3.0) ’" »< w PI”; 15) A piece of plastic with a mass of 1.157 g has a volume of 1.48 cm3. A piece of wood has the same volume, but has a mass of 3.85 g. The density of liquid X is 0.765 g/mL and the density of liquid Z is 1.13 g/mL. The two liquids are immiscible (i.e., do not mix and form separate layers). If the plastic and wood are added to the two liquids, what is the order of the layers from the top to the bottom? \.\5jfj :_- 0,}C0l33lcm5 d Wm“; : LAKCWS A liquid X, liquid Z, plastic, wood \ r B liquid X, plastic, liquid Z, wood C : P1 , 3 Cm5 C) plastic, wood, liquid 2, liquid x “M \Aggcm3 6i i590 \ l D) wood, liquid Z, plastic, liquid X . . . . . ~ ‘ 3» E) plastic, IIQUId x, IIqUId 2, wood a" Oiiglxt dx< d?\ds¥ic<dqsglxw<>$ 9c: ' 16) How many moles of N203 contain 2.55 x 1024 oxygen atoms? A) 4.23 moles N o M / \0, mm “~20 7, B) 12.7 moles NZO: 3.55 X l0 0', MOMS 31L?” / ’ @787 moles N203 \(‘oozmo O atoms 9 mo\ 0. D V 1.41 moles N203 _ ' \' V'\ 10* S o N \j M fl, ——-~—~ Whvm“ 17) During week 2 of a Chemistry 101 course, Professor Meyer demonstrated the combustion of methanol (CH4O). What is the coefficient for methanol in the balanced chemical equation for this reaction? A) 1 s]: {6 ® 3 s?- + 231 Lb.- . C) 3 k4qu "f Eda/Li,“ Lbliy L3) D) 4 is) I E) 5 18) Estradiol is a female sex hormone that causes maturation and maintenance of the female reproductive system. Elemental analysis of estradiol gave the following mass percent composition: C 79.37%, H 8.88%, O 11.75%. The molar mass of estradiol is 272.37 g/mol. What is the molecular formula of estradiol? Ir moi“ ‘ 2 I”. (flea \OOfi SCAM?\Q/ r4) :i.c\fb“+ojc’ 1k w N U; ’6 C9H120 Motdr mas; 73.6099 H a“ ,__m_Q.L \ may i. “0‘3 0351414 M61111} B 18H24O2 : Lm-sq’almfi H ’ if ’93)... :37 C) C27H3603 Em?“ CO“. C H L Haj) / x D) CH O ‘ ' “008 am ‘03335 ;; f" n n'q 51mm E) CsT‘feO2 (2.13M 0.13% oz? aw wit)th % tbb \ \l r. 23.332131 : — are. “1% .. ’F‘ofmvflq molar mqg3 Dbkq “Alma 3k .9 Y win 4-: 19) An infant acetominophen suspension contains 80 mg/ 0.80 mL suspension. The recommended dose is 15 mg/kg body weight. How many mL of this suspension should be given to an infant weighing 14 lb? Assume two significant figures. (Hint: 1 kg = 2.2046 lb) :7 : \M ‘5‘“3 :\O.‘15mt,. @3222: \1\\vt......t l «j $0.3 20) Elements A & Q form two compounds. The ratio, (mass Q) / (mass A) for compound one is 0.271 and ratio (mass Q)/(mass A) for compound two is 0.362. If compound one has the chemical formula AQ, what is the chemical formula for compound two? A304 $119 40am M SEQ; 0.301 B) A203 MA mA C) AQ , 0 A0: :7 Ah) 9 E) none of the above ...
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Quiz1_219 - \ \ i 1 l i 1'] y Chemistry 101 Section 219...

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