should occur, write NONE 10. Complete and balance these chemical equations. If n
ID: 548913 • Letter: S
Question
should occur, write NONE 10. Complete and balance these chemical equations. If no reaction HCl (aq) HCl(aq) Cu(s) b.Zn(x) + KOH (aq) + HBr (aq) 11. Complete this enthalpy diagram for the process H c,n, (i) C,H. (g). Add an arrow between the T and "s"to show phases for initial and final states to indicate the change, and fill in the letters 12. The molar heat of vaporization for is 24.54 kJ/mol The molar mass for propane is 44.12 g/mol. How much heat is needed to vaporize 275 grams of CH,7 kJ 13. When permanganate ion oxidizes oxalate ion in acid to form carbon dioxide and manganese(di) ion Go,"(aq) 2 CO, (g) + 2 e", Scale and combine these to write the balanced net ionic equation: half reactions are: 8 H. (aq) + 5 e. + MnO.. (aq) Mn. (aq) + 4H00) and 14. What is the density of molecular chlorine gas, in gram/liter units, under STP conditions? Part II. Print the letter for the one best answer (48 points) 1. Consider an ideal gas. Which one of these pairs of quantities may be represented by this graph? A. pressure s. temperature B. volume vs. amount C density vs. temperature D. average molecular speed vs. temperature 10.00 mL of an unknown HCl (aq) solution was titrated to the end point with 21.15 mL of 0.0492 M NaOH (a). What was the original acid concentration ? A. 0.104 M -2. B. 0.0233 M C. 0.961 M D. 4.30 M -3. A gas tank used for dispensing Guinness beer has a mixture of 15.0 kg CO, with 32.0 kg N2 at a total pressure of 450 atm. What is the partial pressure of ntrogen in this tank2 A. 30.6 atm B. 34.7 atm C. 21.1 atm D. 58.4 atnmExplanation / Answer
10.
(a)
Cu (s) + HCl (aq.) -----------> No reaction
(b)
Zn (s) + 2 HCl (aq.) -------------> ZnCl2 (aq.) + H2 (g)
(c)
KOH (aq.) + HBr (aq.) -------------> KBr (aq.) + H2O (l)
11.
C3H6 (l) ----------> C3H6 (g)
Towards top draw this arrow.
Enthalpy of gas is greater than in liquid.
12.
Heat needed to vapourise 44.12 g. of propane = 24.54 kJ
Then, heat needed to vapourise 275 g. of propane = (275 / 44.12) * 24.54 = 152.9 kJ
13.
Multiply reduction half reaction by 2 and oxidation half reaction by 5 to equalise the electrons.
16 H+ + 10 e + 2 MnO4- -----------> 2 Mn2+ + 8 H2O
5 C2O42- --------------> 10 CO2 + 10 e
On combining both of them,
2 MnO4- + 5 C2O42- + 16 H+ -----------> 2 Mn2+ + 10 CO2 + 8 H2O
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