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Intramolecular forces refer to the bonding forces within a molecule. Choose which forces are involved in the following change. those allowing fog to form on a cool, humid evening in Houston a. intra
Choose the strongest interparticle force in this substance. Kr a. dipole-dipole b. dispersion c. H-bonding d. ionic bonds e. dipole-induced diploe
Which of the following statements is true about p-type silicon semiconductors? a. It is produced by doping Si with P or As. b. It does not conduct electricity as well as pure Si. c. Electrons are th
why is it important to allow the flask and contents to cool to room temperature before weighing
Which of the following combinations of n and l represent real orbitals and which are impossible? 4s 3p 3f 2p
Give the number of atoms in the unit cell. Assume the structure consists of identical atoms. face-centered cubic a. one b. two c. four d. eight
Can't make it work. You have 0.035 +/- 0.002 mol of red dye, which you mix (thoroughly) with 25.00 +/- 0.05 mL of water. What is the concentration of the dye mix .001400 +/- .000008 M
Calculate the percent ionization of 8.0×10?2 M lactic acid (Ka = 1.4x10^-4) Calculate the percent ionization of 8.0×10?2 M lactic acid in a solution containing 4.5×10?3 M sodium la
Solve for the temperature if there are 1.231 L of 0.5387 moles of nitrogen at a pressure of 731.2 mm Hg.
which equation best describes the average rate for the reaction shown. A (aq) + B 9aq) -----> C (aq) + D (aq) A. rate= [C] [D] / [A] [B] B. rate= - deltat/-deltaB C. rate= -delta[C]/delta t D. ra
Consider the reversible reaction: 2NO2(g)<--> N2O4(g). If the concentrations of both NO2 and N2O4 are 0.016 mol L-1, what is the value of Qc
What would happen to the A450 value for a smaple which include : 1mL of 0.0025M Fe(NO3)3 + 1mL of 0.0025M KSCN + 5.0mL of 0.1M HNO3 if you accidentally added 5 drops of disodium hydrogen phosphate
At 720'c the equailibrium constant Kc for the reaction below is 2.37*10^-3. If the constant of materials is [N2]=0.638M [H2]=8.80M and [NH3]=3.65M, predict if the equilibrium will have a net reactio
Calculate the pH of a solution prepared by mixing equal volumes of 0.21M methylamine (CH3NH2), Kb = 3.7X10^-4 and 0.61M CH3NH3Cl
Wish to detemine the reaction order and rate constant for the following thermal decomposition reaction 2AB2- -> A2 + 2B2 A) What data wolud you collect
Calculate the molar mass of an unknown solid (assume a non nonelectrolyte) if 1.35 grams of the solid was dissolved in 15.0 grams of dodecanol and caused a freezing point depression of 2.34 degrees
The dehydration of trans-2-methylcyclopentanol with H2SO4 will give what major product? a) cyclopentene b) 1-methylcyclopentene c) 2-methylcyclopentene d) 3-methylcyclopentene
Which compound will be most reactive in an E2 reaction with NaOEt in EtOH? a) (CH3)3CF b) (CH3)3CCl c) (CH3)3CBr d) (CH3)3CI *Any explanation as to why the answer is correct would be helpful:)
For the overall reaction A + 2B > C which of the following mechanisms yields the correct overall chemical equation and is consistent with the rate equation below? rate = k[A][B]
You forgot to label your layers after extractio, describe a fast method for determinng which layer is your organice phase
Give the structural formulas for all of the different alkenes that can be hydrogenated with h2/pt to produce n propyl cyclohexane
Given the following information A+B-> 2D deltaH=-637.1 KJ deltaS=336.0 J/K C -> D deltaH=544 KJ deltaS=-233.0 J/K calculate ?G° for the following reaction at 298 K. A+B->2C DeltaG=? KJ
The steam reforming of methane is widely used in industry to make hydrogen, as given in the following reaction:CH4(g) + H2O(g) ? CO(g) + 3H2(g) a) Calculate the (approximate) enthalpy change
The equilibrium constant Kc for the following reaction PCl3(g) + Cl2(g) <--> PCl5(g) equals 49 at 230°C.If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230 d
If 0.5mL of .3% (mass) ethanol is oxidized with 10mL 0.005M K2Cr2O7 , what volume of 0.05M Fe(NH4)2(SO4)2.6H2O is needed to titrate the excess potassium dichromate