<p>Heat of sublimation.</p>
<p>for the sulfur being a greater oxidizing agent, what was the second part to this question?</p>
<p>I believe it was "BECAUSE sulfur has more electrons that chlorine", which was false.</p>
<p>yeah, I think that was it so it was F/F</p>
<ol>
<li> How limestone reacts with acid rain (neutralization because limestone is Ca(OH)2 and when you pour an acid onto that it'll probably neutralize
limestone is a base and acid rain is an acid)</li>
<li> NaF, NaCl, NaBr, NaI, NaAt: highest melting point (NaF)</li>
<li> Potassium and water (forms OH- and H2)</li>
<li> Iron filling and sulfur powder (magnet and cardboard)</li>
<li> NaCl and water (condenser and distillation)</li>
<li> Different ink (chromatography)</li>
<li> An electron in a radioactive reaction; electrons dont take up 1/3 mass (I and II)</li>
<li> K+ and Na+ are not isotopes</li>
<li> Diamond and graphite have the same structure because the are both pure forms of carbon
not the same structure (F/T)</li>
<li>I. CO2 has polar bonds but is not a polar molecule II. CO2 has linear structure. (TTCE)</li>
<li>Cs is the most reactive in water because it is an alkali metal</li>
<li>Which one isn't in the elemental state (Na)</li>
<li>O2 and O3 what are they? (allotropes)</li>
<li>CO2 forms an acid but not a STRONG acid</li>
<li>Collection of gas over water: O2 and H2 only (no HClsoluble in water)</li>
<li>Brittle, could conduct electricity when melted (ionic bond)</li>
<li>Water boiled at a lower temp at higher altitudes and air pressure is lower at higher altitudes. (True b/c water boils at lower temp. but false b/c pressure is lower at higher altitudes) (T/F)</li>
<li>Limiting reagents question: 1A + 2B -> 1AB2 there was 500 milliliter .1 molar solutions mixed together, how much product was formed</li>
<li>Vanadium: VO2 if you have 5.1 grams of vanadium and its oxide form weighs 8.3 grams, what is the formula?
5.1 g is .1 mole of Vanadium and the rest 3.2 is 10% of 32 grams (the weight of two oxygen atoms).</li>
<li>HgI2 + H2S --> HgS + 2HI or HgCl2 + H2S --> HCl + HgS2 or Hcl + hgs in products (I because it was definitely Hg(2) in the reactants since it was HgCl2. And since S is (-2), then the subscripts will cancel out so HgS and it does not need any coefficients.)</li>
<li>Lab question: cant heat graduated cylinder</li>
<li>How many unpaired electrons could fit into a p orbital (3)</li>
<li>0.05 on PbI2 (precipitate)</li>
<li>65 grams for something</li>
<li>I. [picture of hydrocarbon] is an isomer of [another picture] II. isomers have the same molecular formula but different structures (TTCE)</li>
<li>3 for oxidation one (nitrogen family)</li>
<li>temperature cannot be used to use ideal deviation</li>
<li>heat of sublimation (solids to gas)</li>
<li>22.4 for one of them</li>
<li>11.2 for the other gas one (2 atm, NO2, 273K)</li>
<li>S stronger oxidizing agent than Cl- BECAUSE sulfur has more electrons that chlorine (F/F)</li>
<li>C to CO2 oxidization (0 to +4)</li>
<li>The one where temperature decrease from 200K to 100 K, pressure increases, then they ask for the volume. (1.5 atm)(V) / (100K) = (0.75 atm)(V)/(200K) (the volume remains the same at 8L)</li>
<li>There was a reaction asking what the oxidation states changed for Nitrogen in the reaction (+5 to 3)</li>
<li>Does not affect temperature (density)</li>
<li>London dispersion forces for the Nitrogen question</li>
<li>H2O is NOT a strong electrolyte (so I and II only).</li>
<li>Gases are more compressible than liquids, fewer intermolecular forces (T/F)</li>
<li>How many covalent bonds did propane have? 10</li>
<li>Fe2(SO4)3 dissociates into 5 mols of ions</li>
<li>Degree of acidity (indicator)</li>
<li>I. NaOH forms a basic solution II. It dissociates into OH- ions. (strong base so TTCE)</li>
<li>Is it possible to emit a particle with a negative charge in a nuclear reaction? (yes-beta decay)</li>
<li>I. Iron mesh rusts faster than iron block of the same mass. II. Iron mesh has greater surface area (TTCE)</li>
<li>Spectator ions: Cl- and Na+</li>
<li>Question with the reaction diagram-endothermic/exothermic (F/T)</li>
<li>An NaCl solution has a lower freezing point than water BECAUSE NaCl has a greater molar mass than water (because of bonding, not molar mass so T/F)</li>
</ol>
<p>Question(s):
1. Coefficient of PbI2 (or how much was formed)? Balancing equations question (or stoichiometry)
2. Lowest coefficient for that equation with the CaCO3</p>
<p>I dont know what question #27 is referring to. Have we decided that it is the same question as #35?</p>
<p>For #38 I thought it was TT: gases are more compressible than liquids BECAUSE of fewer intermolecular forces</p>
<p>Does anyone remember the equation for #45? And can someone explain to me questions 18, 20, 23, 24, 29, 32?</p>
<p>for 38, gases do have weaker intermolecular forces than liquid.</p>
<p>and just making sure, u meant to say "weaker" right, not "fewer"?</p>
<p>and for 45, i dont remember the exact equation, but sodium is ALWAYS a spectator in solution. and Cl- doesnt do anything b/c it was part of HCl, which is a strong acid (dissociates)</p>
<p>umm...I don't quite remember the question. Did it say weaker or fewer? Because I'm pretty sure I put TTCE on that question but if it had said "fewer" that would pretty much suck.</p>
<p>Well, gases are assumed to have no intermolecular forces... so weaker and fewer would both work, right?</p>
<p>C to CO2 was one of the beginning questions that you match to the answer choice. you had to choose what caused C to become CO2. in this case it was oxidation because it loses electrons and goes from 0 to -4.</p>
<ol>
<li>An NaCl solution has a lower freezing point than water BECAUSE NaCl has a greater molar mass than water (because of bonding, not molar mass so T/F)</li>
</ol>
<p>This is T/T</p>
<p>NaCl DOES have a greater molar mass than water, the fact that bonding explains the first statement simply means it's not a correct explanation...that has nothing to do with the validity of the second statement</p>
<p>That one that had like something + something + 2200 joules -> somethings + something, was the answer add heat cause everything else didnt work. I think it involved the Keq and it asked you something. </p>
<p>On that note there was a couple other Keq's which mainly involved having a large product meaning a lot of reactants, just basic stuff or so I remember.</p>
<p>That brings up one more question, there was another chemical reaction involving Joules where i think you simply had to divide/multiply by 4 or 2, cant remember.</p>
<p>the 2200 one or w/e turned out to be 555 or something kJ released.</p>
<p>jyankees is correct, oh i hope i didn't make that mistake.. i do that a lot. i do remember adding them though.</p>
<p>gases do have intermolecular forces.</p>
<p>darn, i didnt see the word "solution" with NaCl, so i thought it was talking about molten NaCl.</p>
<p>i put NaAt too..cuz of the charges and it has a larger atomic radii</p>
<p>Sorry, for ionic compounds, bp depends on the distance between atom centers. On the other hand, for covalent compounds, bp depends on polarizability of electron cloud (for example, HI>HCl)</p>
<p>what about the question with "the process with which solid C is converted to gaseous CO2</p>
<p>was one of them heat of sublimation or heat of fusion????</p>
<p>i got heat of fusion</p>
<p>sucralose: that one is oxidation.
phd89: I didn't get a heat of fusion, however purple vapor forming from the solid iodine crystals is sublimation.</p>
<p>yes foolonthehill is right. heat of sublimation was the last problem.</p>
<p>Why couldn't C(s) turning into Co2(g) be considered sublimation?</p>