<p>There were two gas problems. One answer was 75 or 76K and the other was 400/300 atm.</p>
<p>Anyone remember the sig fig one? Because I don’t.</p>
<p>Anyway, the answer to the measurement was buret. I was in the wrong. 50mL graduated cylinders are only accurate to one tenth.</p>
<p>I believe it was …1.29? I don’t even remember the problem lol but I think that was it.</p>
<p>It was 1.29.</p>
<p>**I am facing sever problems with formatting the test to fit into the specifications of the program CC uses, hence Post Message me with your email address and a note saying something like “please send me the test” and i will do so.</p>
<p>Right now i have 75 questions!!!</p>
<p>Your savior,</p>
<p>Pinki**</p>
<p>yeah, the gas problems were 75 and 400/300</p>
<p>Do you know what the question was for the 400/300 problem?</p>
<p>great my comp shut down and i lost the new copy of the file, but im sending out the copy with 65 questions now</p>
<p>post any corrections/sugestions on this thread…and dont bicker about burrete/g. cylendar</p>
<p>Can I have a copy?</p>
<p>66/85 SO FAR. LETS WORK TO GET THE MISSING 19</p>
<p>What is the main component in glass?</p>
<p>SiO2</p>
<p>What is the lewis-dot structure of HCN?</p>
<p>What would be the formula of CxOy if it is added to one mol of oxy-gen and produces .5 moles of carbon dioxide?</p>
<p>C2O3</p>
<p>The oxidation states in aluminum sulfide?
Aluminum: +3
Sulfur: -2</p>
<p>Which of the following is a hydration reaction?</p>
<p>CuSO4 + H2O CuSO4X5H20 </p>
<p>Which substance is blue?</p>
<p>Copper sulfate pentahydrate</p>
<p>Which substance is white?</p>
<p>Ammonia nitrate</p>
<p>A catalyst does what to A + B C?</p>
<p>Speeds up the forward and reverse reactions</p>
<p>forms a precipitate?</p>
<p>adding HCL to AgNO3</p>
<p>Most accurate for measuring 27.29 mL of a liquid?</p>
<p>Burette (or maybe a graduated cylinder who knows)</p>
<p>Which of the following are needed to measure specific heat?
I. calorimeter
II. balance
III. thermometer
I,II, and III </p>
<p>The percentage by mass involving Cd, O and H:</p>
<p>Cd(OH)2</p>
<p>Why is there a huge “Drop off” in the chart about the volume of NH3?
Because of condensation</p>
<p>Which of the following is correct lab procedure?</p>
<p>I. Never pour water into Acid
II. Return unused chemicals to original container
III. Always were eye protection</p>
<p>I and III</p>
<p>Which of the following is amphoteric?</p>
<p>HCO3 </p>
<p>I dentify the Delta H in each of the following reactions: (four sepa-rate questions)</p>
<p>Delta H sublimation: CO2(s) –> CO2(g)
Delta H fusion: H2O(s) –> H2O(l)
Delta H combustion: O2(g) was a reactant
Delta H combination: Na + Cl –> Nacl</p>
<p>which equation is an oxidation reduction reaction?
Cu+2 + Fe –> Cu + Fe+2</p>
<p>Which is Polymerization?</p>
<p>(im not sure it was either C, two hydrocarbons, or E)</p>
<p>Which is a combustion reaction?</p>
<p>What happens when you add CL ions to Silver Nitrate?</p>
<p>A precipitate will form</p>
<p>Adding NaCl to a saturated solution makes no change in concentra-tion T because NaCl is soluble at 25 degrees T</p>
<p>Water is a poor conductor T because Water only ionizes slightly T, CE</p>
<p>NH3 is a better base then Water T Because (I don’t remember the second statement but it was T), CE</p>
<p>H2S is polar T because it has two lone electron pairs F</p>
<p>When you run electrons through pure neon gas it releases light T because when electrons return to their ground state photons are re-leased T, CE</p>
<p>Metals are good conductors of electricity T Because metals can form both positive and negative ions F (im not so sure about the second statement)</p>
<p>How much energy does it take to make 18 of water? (Heat of com-bination is 334/g)</p>
<p>6012 KJ
Graph Pressure vs. Volume:</p>
<p>Graph Volume vs. Temperature:</p>
<p>Graph Time vs. Product Concentration: </p>
<p>Which of the following is not part of the modern atomic theory?</p>
<p>That Atoms are indestructible</p>
<p>The percentage by mass question of Carbon (75%) and Hydrogen (25%)?</p>
<p>CH4</p>
<p>Which element is the hardest to oxidize?</p>
<p>Fluorine</p>
<p>Which of the following elements is radioactive?</p>
<p>At (astatine)</p>
<p>What does CO3-2 act as in the following reaction?</p>
<p>A base (conjugate-base)</p>
<p>The PH of a solution changes from 4 to 2, the [H+] is now what times greater?</p>
<p>100</p>
<p>A question where the volume stays the same but the temperature and pressure change:</p>
<p>(Answer) 400/300</p>
<p>Which of the following has the lowest first ionization energy?</p>
<p>K (potassium)</p>
<p>Which of the following is not an acid?</p>
<p>C2H6</p>
<p>There was one about the partial pressure of oxygen and nitrogen:</p>
<p>(answer) oxygen has 3X nitrogen</p>
<p>What is the oxidation state is At in H3AtO4?</p>
<p>+5</p>
<p>At STP there are 3 X 10^23 molecules of a gas in a container, which of the following could be the substance?</p>
<p>22 grams of CO2</p>
<p>One question was what element X can form XH3 and it was P.</p>
<p>There was how much of NaOH is needed to form a .1M 25.0mL solu-tion</p>
<p>.500 mL of some liquid (density 2.50 g/ml) and you add .0431 g of some solid. It weighs 1.29g</p>
<p>There was a question about PH3, it was trigonal pyramidal and the lone pairs created a repulsion TTCE</p>
<p>There was a question about acetic acid and it was 6.0g</p>
<p>Elements 21-28 fill the 3d shell</p>
<p>Elements in the same family form the same type of compound be-cause they have the same number of valence electrons. TTCE</p>
<p>Adding an acid to a solution containing CO3 2-. A gas is evolved.</p>
<p>Kr was the noble gas</p>
<p>Nitrogen was the diatomic gas</p>
<p>There was a question on which was a transition element. (I forgot what it was)</p>
<p>As you go down in a family the radius increases, adding neutrons to the nucleus increases radius. TF</p>
<p>Adding heat to a closed vessel increases reaction rate because:
I. More collisions
II. Activiation energy is lowered
III. More molecules have the right about of energy to collide.
I and III</p>
<p>SO2 + O2 <-> SO3 + heat
Adding more O2 increaes SO3 concentration</p>
<p>CS2 + O2 -> 1 mol of CO2 and 2 mol of SO2</p>
<p>2Al(OH)3 + 3H2SO4 -> 6H2O + Al2(SO4)3</p>
<p>There was some combustion question where it asked for the coeffi-cient of O2 and it was 13</p>
<p>If you double pressure and double temperature, the volume will stay constant. Because pressure and temperature are inversely pro-portional. TTCE.</p>
<p>There was a gas question where you had to find the temp and it was 75 K</p>
<p>1 mol of water is formed from H2 and O2 and it releases 280kJ. How much heat would be released with .5 mol of water. 140 some-thing kJ.</p>
<p>Ca2+, K+, Ar, S2-, Cl- have the same number of electrons.</p>
<p>M forms the compound MO or something that had a -2 charge so M had to be +2. And the one that it could not form was MC2H3O2.</p>
<p>Adding more NaCl to a saturated solution will not change the con-centration. NaCl is soluble. TT</p>
<p>pH of a 0.01 M solution of HNO3 = 2</p>
<p>There was some balancing where the coefficient of N2 was 3.</p>
<p>i recall some kind of question about 120 g of a compound containing iron and sulfur, and then it asked you to find the amount of iron produced by 32 g of sulfur i think</p>
<p>Oh yeah I remember that, it was Fe + 2S -> FeS2 so it would be .5 mole of Fe which was 28g.</p>
<p>One question was what element X can form XH3 and it was P.</p>
<p>What was that one? I don 't remember. </p>
<p>There was also another one that was like Which of the following is a transition metal? But I forget the answwer, it was whatever the transition metal was. It was part of the “occurs naturally as radioactive” where the answer was At</p>
<p>For the Fe + S question, it asked for the mass of FeS2 formed, so the answer was 60g</p>
<p>Can you, like, idk, italicize the questions? It’s really confusing.</p>
<p>Anyway, the transition metal cliche is talking about was Rh. The noble gas was Ar, not Kr.</p>
<p>Which of the following are needed to measure specific heat?
I. calorimeter
II. balance
III. thermometer</p>
<p>I think it’s only II and III…</p>
<p>you just measure the m and the dT, and since you already know the specific heat of water… and the mass of water… I did it in physics…</p>
<p>Crosscurrent, adding neutrons would not increase the radius because the radius can only be changed by the number of PELs or the Z effective for the outermost electrons. Adding PROTONS would definitely change it.</p>
<p>Also I think you’re right about the FeS2 question, I really can’t remember the test anymore. Only 17 more days till we find out.</p>
<p>Edit: inn77: Of course you need a calorimeter to measure specific heat! You’re measuring specific heat, you can’t assume its water which you know the specific heat for. Every substance has a different specific heat.</p>
<p>q=MC(DELTA)T…so I think you need calorimiter to ensure that no heat escapes the system. I’m curious though how did you do it in physics?</p>
<p>we used a styrofoam cup… I’m hoping that doesn’t count as a calorimeter…</p>
<p>Indeed it is.</p>