::::: Official SAT Chemistry 2012 :::::

Archive SAT Subject Test Preparation
81

<p>It specifically said Different ratio. CB put that option to trick you</p>

82

<p>what was the one with argon?</p>

83

<p>There was one with the graph of the average kinetic energies.</p>

84

<p>^ magnificent, what did you put for that graph? it said like, the highest temperature was the first part, but I chose the flat part in the graph was when the solid melted solidifies.</p>

85

<p>The M (alkali metal) + O2 I thought was M (alkali metal) + H2O —> ???</p>

86

<p>^HarveyMudd i chose (A) for that question</p>

87

<p>me too, after second-guessing myself, but the answer would be M + H2O → MOH + H2 (not balanced, and not M2O + H2)</p>

<p>the KE vs molecules one was answer A) with second graph farther up in x-axis being at higher temperature</p>

88

<p>HarveyMudd, i think the answer is (A) isn’t it?</p>

89

<p>The answer is the one with OH- and H2 as products with M+, which I don’t believe was A,</p>

<p>A was forms M2O and H2 which is not right.</p>

<p>and sugar’s melting point > water’s melting point and boiling point (or whatever) so that relationship one was: T/T</p>

90

<p>Are you sure that this is not the right answer? 2M + H20 -> M2O + H2?</p>

91

<p>I am positive</p>

92

<p><a href=“61/85”>b</a> :**</p>

<p>Section A :

  1. 40 K to 40 Ar (Nuclear Transformation)
  2. Iron Oxide produced from iron (Oxidation/Reduction)
  3. One of question set with Iron Oxide (Opposite of Iron oxide answer)
  4. Which has both ionic and covalent bonds? (NH4OH) +
  5. HC2H3O2 pH (pH greater than 1 but less than 7) +
  6. NaCl Salt (pH 7) +
  7. (pH greater than 7 but less than 14) +
  8. Lewis Dot structure for some compound CF3 +
  9. Ozone Destruction (CFCl4) +
  10. Contributes to Acid Rain (SO2) +
  11. Highest Electronegativity (F) +
  12. Lowest First Ionization (Na) +
  13. Which loses 2 electrons (Mg) +</p>

<p>Section B : (7 TTCE)

  1. Baking powder NaHCO3 neutralizes base BECAUSE NaHCO3 behaves as Bronsted acid (T/T CE) +
  2. Something BECAUSE Sugar melting point is higher than water (T/F)
  3. Photon emits light BECAUSE electron emits discrete photons when comes to ground state. (T/T CE) +
  4. Ideal Condition when high temperature and low pressure BECAUSE intermolecular force is greater so volume of gas particles is insignificant (T/T CE) +
  5. 1g of something compared to other 1g of something else BECAUSE 1 mole of something has greater something than something else (F/T) +
  6. Adding water to acid BECAUSE It would cause splattering (T/T CE) +
  7. HC2H3O2 is strong acid BECAUSE Acetic acid has 4 hydrogen atoms (F/T) +
  8. Kw = 1 x 10^-14 when H2O -> H+ + OH- BECAUSE (T/T CE) +
  9. Proton changes in isotopes BECAUSE they have different atomic mass (F/T) +
  10. Na2+ + e- Na+ takes larger energy than Na+ + e- BECAUSE Na+ has larger atomic radius than Na (T/F) +
  11. Higher temperature increases reaction rate BECAUSE Kinetic Molecular energy exceeds the activation energy (T/T CE) +</p>

<p>Section C :

  1. Which has multiple bond (CO) +
  2. Which does not form solution or something like that (CH4OH w/ NH4 OR CH4OH w/ HF)
  3. M = Alkali metal, reaction with Oxygen (2M + H2O -> M2O + H2 - Choice A)
  4. (CuSO4 x 5H2O) +
  5. (230 KJ = 18 x 13) +
  6. This element’s type is good conductor of electricity (Carbon) +
  7. C2 (covalent network bonds) +
  8. Easiest to be oxidized (1s2 2s2 2p6 3s1) +
  9. Highest energy level for the element (3p) +
  10. Ba(SO)4 reacted with some 1.0 M X element, white colorless gas, brown gas ()
  11. When empirical formula is XO, O mass percent is 64%, find the molar mass of X (9 grams/mole X) +
  12. (K = 1 x 10 ^ -5) +
  13. Separate Methyl Alcohol and Water (Distillation) +
  14. Separate KI, sand, and Iron filing (Water extraction) +
  15. Elements combining in different ratio (FeO & Fe2O3) +
  16. Which makes a solution weak acid? (CO2) +
  17. Linear shape (CO2) +
  18. As Atomic number increase in halogen (Atomic radius increases) +
  19. Order of periodic table (Increase in atomic number) +
  20. Highest Rate of Effusion (H2) +
  21. explanation of graph where line is straight (Ice melted becomes solidified) +
  22. (evolves gas)
  23. Which is liquid at room temperature (Br2) +
  24. Which has the highest H grams? (One with 0.6 x 16) +
  25. Something about precipitate (Fe)
  26. Which is endothermic (CO2 (s) -> CO2 (g)) +
  27. Ionization constant, so which has smallest concentration? (one with smallest K)
  28. Which of these is not a redox reaction? (H+ + O2- -> H2O) +
  29. Salt dissolves in water has following properties (D or E, answer was not Higher Vapor Pressure, Higher Freezing point, Lower Melting Point)
  30. Which has the highest pressure in 1L Container? (H2) +
  31. (0.0500 x 6.02 x 10^23) +
  32. (2L x 740/760 x 273/300) +
  33. (0.5 moles H2) +
  34. Which has the most Valence electrons? (Phosphorus) +
  35. Balancing Al(OH)2 (2) +
  36. Balancing Some Compound (1) +
  37. Number of molecules vs. Average Kinetic Energy Graph (Higher Kinetic energy) +</p>
93

<p>Anyone, please comment on which one is wrong on this list.</p>

94

<p>like I have posted, sugar melting point is above water so that should be T/T
and M (alkali metal) + H2O becomes M+ and OH- and H2</p>

95

<p>alright, any other wrong answers on this list??</p>

96

<p>Ideal Condition when high temperature and low pressure BECAUSE intermolecular force is greater so volume of gas particles is insignificant</p>

<p>Isn’t inter-molecular force weaker at higher temp?..</p>