CHEM 1A Midterm: Chem 1A Midterm Review

PerkinElmer Spectrum Version 10.03.05 Wednesday, February 21, 2018 2:06 PM Analyst Date CUW Chemistry Wednesday, February 21, 2018 2:06 PM 10 830.99cm-1 100 95 90 85 80 1412,74cm-1 1084.80cm- 3424.52m-1 2937·80cm-1 1718.64cm-1 606.23cm-1 1463.9 2880.30cm-1 1376.74cm- 886.02cm-1 2967.40cm-1 65 60 1006.12cm-1 1151.75cm-t06.84cm-1 50 45 940.29cm-1 40 39 4000 3500 3000 2500 2000 1500 1000 450 cm-1 Administrator 13 Sample 013 By Administrator Date Wednesday February 21 2018 Page 1

CUNY, Lehman College-CHE ' New Tab ibiscms/mod/ibis/view.phpid-2900864 4 Jump to... CHEM 114- Fall16-DERI | Activities and Due Dates Unit 7 Skills Practice Video A 10/1/2016 11:55 PM O 1/3。10/1/2016 03:21 PM Gradebook Print Calculator -d Periodic Table Incorrect ..!Incorrect ,11, incor Question 2 of 3 Map Sapling Learning For the following chemical reaction, how many moles of calcium carbonate (CaCO3) will be produced from 6 mol of sodium carbonate (Na2CO3)? Na,co,+8a(NO3)2 CaCO3 + 2NaNo, → Number 3.6 x 102 mol

4 72% Fri Mar 21 5:05 PM Q. E Finder File Edit View Go Window Help Screen Shot 2014-03-21 at 4.52.43 PM Screen Shot 2014-03-21 at 4.52.57 PM Consider the following mechanism. Trial [A] (M) [B] (M) Rate (M/s) Using the given data, calculate the rate constant of step 1: A B C Slow this reaction 1 0280 0200 001 2 0.280 0.500 0.0788 step 2 A C D fast C +D A B 3 0.336 0.200 0.0151 overall: 2 A+ B D Determine the rate law for the overall reaction (where the overall rate constant is represented as k) Select answer rate Screen Shot 2014-03-21 at 4.53.11 PM Screen Shot 2014-03-21 at 4.53.18 PM Chemical reactions occur when molecules or atoms collide, the bonds between atoms are broken, and new The following reaction has an activation energy of 262 kJmol bonds are formed. Breaking the bonds of the reactants requires energy, bond formation releases energy Which of the following s regarding energy changes during a reaction are true? If the energy of the products is lower than the energy of the reactants, the reaction is At 600.0 K the rate constant is 6 0 5 s M. What is the value of the rate constant at 835.0 K? endothermic g the amount of reactants increases the number of collisions, and the reaction goes Taster Number Reactants must collide, with proper orientation, with energy greater than or equal to the activation energy for a reaction to occur When the activation energy is low, the reaction rate is slow The activation energy (Ea) is the energy difference between the energy of the products and the energy of the reactants The energy of a collision between atoms or molecules must be greater than the activation energy (Ea) for bonds to be broken Decreasing the temperature decreases the kinetic energy of the reactants, and the reaction goes more slowly