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Quiz 1: Quantitative Chemistry

10 Questions  I  By WlHKIED
Quiz 1: Quantitative Chemistry
This quiz consists of 10 questions.
Each question offers 4 suggested answers. Choose the answer you consider to be the best.
The maximum mark for this quiz is 10.
Answer ALL the questions.
You have 20 minutes to attempt all the questions. You may use the Periodic Table from the back of your book.

  
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Question Excerpt

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1.  What is the number of oxygen atoms in one mole of «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»C«/mi»«mi»u«/mi»«mi»S«/mi»«msub»«mi»O«/mi»«mn»4«/mn»«/msub»«mo».«/mo»«mn»5«/mn»«msub»«mi»H«/mi»«mn»2«/mn»«/msub»«mi»O«/mi»«/math»?
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2.  Which compound has the empirical formula with the largest mass?
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3.  When the equation below is balanced for 1 mol of «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»C«/mi»«mn»3«/mn»«/msub»«msub»«mi»H«/mi»«mn»4«/mn»«/msub»«/math», what is the coefficient for «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«/math»? «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»C«/mi»«mn»3«/mn»«/msub»«msub»«mi»H«/mi»«mn»4«/mn»«/msub»«mo»§nbsp;«/mo»«mo»+«/mo»«mo»§nbsp;«/mo»«mi»_«/mi»«mi»_«/mi»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«mo»§nbsp;«/mo»«mo»§#8594;«/mo»«mo»§nbsp;«/mo»«mi»_«/mi»«mi»_«/mi»«mi»C«/mi»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«mo»§nbsp;«/mo»«mo»+«/mo»«mo»§nbsp;«/mo»«mi»_«/mi»«mi»_«/mi»«msub»«mi»H«/mi»«mn»2«/mn»«/msub»«mi»O«/mi»«/math»
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4.  Calcium carbonate decomposes on heating as shown below. «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»C«/mi»«mi»a«/mi»«mi»C«/mi»«msub»«mi»O«/mi»«mn»3«/mn»«/msub»«mo»§nbsp;«/mo»«mo»§#8594;«/mo»«mo»§nbsp;«/mo»«mi»C«/mi»«mi»a«/mi»«mi»O«/mi»«mo»§nbsp;«/mo»«mo»+«/mo»«mo»§nbsp;«/mo»«mi»C«/mi»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«/math» When 50 g of calcium carbonate are decomposed, 7 g of calcium oxide are formed. What is the percentage yield of calcium oxide?
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5.  «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»d«/mi»«msup»«mi»m«/mi»«mn»3«/mn»«/msup»«/math» of carbon monoxide, CO(g), and 2 «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»d«/mi»«msup»«mi»m«/mi»«mn»3«/mn»«/msup»«/math» of oxygen, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«/math»(g), at the same temperature and pressure are mixed together. Assuming complete reaction according to the equation given, what is the maximum volume of carbon dioxide, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»C«/mi»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«/math»(g), in «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»d«/mi»«msup»«mi»m«/mi»«mn»3«/mn»«/msup»«/math», that can be formed? «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»2«/mn»«mi»C«/mi»«mi»O«/mi»«mo»(«/mo»«mi»g«/mi»«mo»)«/mo»«mo»§nbsp;«/mo»«mo»+«/mo»«mo»§nbsp;«/mo»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«mo»(«/mo»«mi»g«/mi»«mo»)«/mo»«mo»§nbsp;«/mo»«mo»§#8594;«/mo»«mo»§nbsp;«/mo»«mn»2«/mn»«mi»C«/mi»«msub»«mi»O«/mi»«mn»2«/mn»«/msub»«mo»(«/mo»«mi»g«/mi»«mo»)«/mo»«/math»
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6.  A gas sample occupies a volume «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»V«/mi»«mn»1«/mn»«/msub»«/math» at a pressure «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»P«/mi»«mn»1«/mn»«/msub»«/math» and a Kelvin temperature «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»T«/mi»«mn»1«/mn»«/msub»«/math». What would be the temperature of the gas, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»T«/mi»«mn»2«/mn»«/msub»«/math», if both its pressure and volume are doubled?
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7.  A blast furnace contains 1600 kg of iron(III) oxide («math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»M«/mi»«mi»r«/mi»«/msub»«/math» = 160) and 144 kg of carbon («math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»A«/mi»«mi»r«/mi»«/msub»«/math» = 12). Assuming that they react according to the following equation: «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»F«/mi»«msub»«mi»e«/mi»«mn»2«/mn»«/msub»«msub»«mi»O«/mi»«mn»3«/mn»«/msub»«mo»(«/mo»«mi»s«/mi»«mo»)«/mo»«mo»§nbsp;«/mo»«mo»+«/mo»«mo»§nbsp;«/mo»«mn»3«/mn»«mi»C«/mi»«mo»(«/mo»«mi»s«/mi»«mo»)«/mo»«mo»§nbsp;«/mo»«mo»§#8594;«/mo»«mo»§nbsp;«/mo»«mn»2«/mn»«mi»F«/mi»«mi»e«/mi»«mo»(«/mo»«mi»s«/mi»«mo»)«/mo»«mo»§nbsp;«/mo»«mo»+«/mo»«mo»§nbsp;«/mo»«mn»3«/mn»«mi»C«/mi»«mi»O«/mi»«mo»(«/mo»«mi»g«/mi»«mo»)«/mo»«/math» what is the limiting reagent and the maximum theoretical yield of iron?
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8.  Which sample of nitrogen gas, «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mi»N«/mi»«mn»2«/mn»«/msub»«/math», contains the greatest number of nitrogen molecules?
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9.  What will be the concentration of sulfate ions in «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»m«/mi»«mi»o«/mi»«mi»l«/mi»«mo»§nbsp;«/mo»«mi»d«/mi»«msup»«mi»m«/mi»«mrow»«mo»-«/mo»«mn»3«/mn»«/mrow»«/msup»«/math» when 0.20 mol «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»K«/mi»«mi»A«/mi»«mi»l«/mi»«mo»(«/mo»«mi»S«/mi»«msub»«mi»O«/mi»«mn»4«/mn»«/msub»«msub»«mo»)«/mo»«mn»2«/mn»«/msub»«/math» is dissolved in water to give 100 «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»c«/mi»«msup»«mi»m«/mi»«mn»3«/mn»«/msup»«/math» of aqueous solution?
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10.  What volume, in «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»c«/mi»«msup»«mi»m«/mi»«mn»3«/mn»«/msup»«/math», of 0.200 «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»m«/mi»«mi»o«/mi»«mi»l«/mi»«mo»§nbsp;«/mo»«mi»d«/mi»«msup»«mi»m«/mi»«mrow»«mo»-«/mo»«mn»3«/mn»«/mrow»«/msup»«/math» HCl(aq) is required to neutralize 25.0 «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»c«/mi»«msup»«mi»m«/mi»«mn»3«/mn»«/msup»«/math» of 0.200 «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»m«/mi»«mi»o«/mi»«mi»l«/mi»«mo»§nbsp;«/mo»«mi»d«/mi»«msup»«mi»m«/mi»«mrow»«mo»-«/mo»«mn»3«/mn»«/mrow»«/msup»«/math» «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»B«/mi»«mi»a«/mi»«mo»(«/mo»«mi»O«/mi»«mi»H«/mi»«msub»«mo»)«/mo»«mn»2«/mn»«/msub»«/math»(aq)?
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