The October CHEMISTRY SATII Discussion

Test Preparation SAT Subject Test Preparation
21

<p>i put Fe2O3 for that one,
SiO2 is sand - so pretty sure its not that
the others were CaCO3, and 2 other salts</p>

<p>iron(III) oxide stood out</p>

22

<p>I put that too but my reasoning was below, from some random internet site</p>

<p>14.1.12 Iron powder heat pack
The iron powder and the oxygen in the bag react to form iron oxide. Salt speeds this reaction and is therefore a catalyst. The vermiculite insulation ensures that the heat stays in the bag. The iron oxide formed is a compound.
2Fe + 3O2 ---> Fe2O3 + heat </p>

<p>CaCO3 wasn't right cause thats limestone wchih is insoluable in water, and uhh the others were salts. I have no idea. I'm probably wrong.</p>

23

<p>what was the molarity of cl- of the dilution problem</p>

24

<p>and was it 1.7/2.0 x 100 for the oxygen ratio</p>

25

<p>I got 0.03 M and 1.7/3.7 * 100.</p>

26

<p>yea i got that too</p>

27

<p>yeah was 1.7/3.7 choice b? i think i put that. momentary lapse of memory</p>

28

<p>Do you guys want to start a chatroom and discuss some quesitons instead of sporatic posting on this?</p>

29

<p>partial pressure of Nitrogen = 100 mmg, o2 was given as 200mmg</p>

30

<p>DOes anyone remember that question between basically CH3OH and Acetic acid? I believe it was something about boiling point... anyone remember what the ansewr was?</p>

31

<p>What was the answer to the gaseous equilibrium problem where you wanted the greatest yield of products? I think I might have misread whether the pressure decreased or increased.</p>

32

<p>Volume was decreased so pressure increased. it was D. 5 mols of gases on the reactants, 3 mols of gases on products</p>

33

<p>Okay, good.</p>

<p>I vaguely remember that methanol and acetic acid problem, but I forgot what the answer was.</p>

34

<p>are you guys having a chem chat?</p>

35

<p>GUYS WHOEVER wants to join the chat please PM me with your screen name</p>

36

<p>it was ch3oh. the question asked for which least ionizes in water</p>

37

<p>Oh, does anyone remember the question that asked for the conjugate acid/base pair?</p>

38

<p>it was h2o and OH- im pretty sure</p>

39

<p>got that too. we have 3 ppl in a chatroom if anyone else wants to join</p>

40

<p>anyone remember the last one?</p>