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Week 12 Tues Quiz

Quiz by Kari Stone

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8 questions
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  • Q1

    Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen.  The molecular weight is 194.19 g/mol. (Ex. N5O2)

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    300s
  • Q2

    Write a balanced equation to show the reaction of gaseous ethane (C2H6) with gaseous oxygen to form carbon monoxide gas and water vapor. Just type the stoichiometric coefficients separated by a comma. (ex. 1, 2, 3)

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    300s
  • Q3

    In which set do all elements tend to form cations in binary ionic compounds?

    Sr,  Ni,  Hg

     N,  P,  Bi

    K,  Ga,  O

    O,  Br,  I

    300s
  • Q4

    According to the following balanced reaction, how many moles of KOH will be formed from 5.44 moles of H2O?  Assume an excess of KO.

     

                            4 KO(s) + 2 H2O(l)  →  4 KOH(s) + O2(g)

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    300s
  • Q5

    A 14.01 g sample of N2 reacts with 3.02 g of H2 to form ammonia (NH3).  If ammonia is the only product, what mass of ammonia is formed?

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    300s
  • Q6

    Give the theoretical yield, in moles, of CO2 from the reaction of 4.00 moles of C8H18 with 4.00 moles of O2.  

                            2 C8H18  +  25 O2   →  16 CO2  +  18 H2O

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    300s
  • Q7

    Give the percent yield when 28.16 g of CO2 are formed from the reaction of 4.000 moles of C8H18 with 8.000 moles of O2. 

     

                            2 C8H18 + 25 O2  →  16 CO2 + 18 H2O

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    300s
  • Q8

    According to the following reaction, what volume of 0.244 M KCl solution, in mL, is required to react exactly with 50.0 mL of 0.210 M Pb(NO3)2 solution?

     

                                        2 KCl(aq) + Pb(NO3)2 (aq) → PbCl2(s) + 2 KNO3(aq)

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    300s

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