Atomic, Compound, IMF Structures and Properties
The molecular geometry of SO2
What is bent?
The rate law for the reaction: O3(g)+NO(g)→O2(g)+NO2(g)
What is Rate=k[O3][NO]?
When K>>1 the reaction is _____-favored; equilibrium lies to the _____
What is product, right?
The species most prevalent at the equivalence point with a titration of HNO3 and NaOH.
What is Na+ and NO3- ?
The type of reaction that occurs when △H is negative (exothermic or endothermic)
What is exothermic?
The element that has the greatest first ionization energy between P and S.
What is P?
The net ionic equation when solutions of CuSO4 and AgNO3 are mixed, a precipitate forms.
What is SO42-(aq)+2Ag+→Ag2SO4(s)?
The equilibrium constant expression of N2(g)+3H2(g) ⇔2NH3(g)
What is Kc=[NH3]2/([N2][H2]3)?
One of the following that can be mixed to create a buffer.
HNO3 mixed with NaNO3
HNO2 mixed with KNO2
NH3 mixed with HCl
NaOH mixed with NaCl
What is HNO2 mixed with KNO2?
The reaction is spontaneous only at high temperatures, what is △H and △S?
What is △H = + and △S = + ?
Rank the following from highest boiling point to following: NO3-, SiO2, NaCl.
What is SiO2, NaCl, NO3-?
Step 1: NO+Br2→NOBr2 (fast)
Step 2: NOBr2+NO→2NOBr (slow)
The rate law for this mechanism.
What is Rate=k[NO]2[Br2]?
The Ksp for PbCl2 given that the molar solubility of PbCl2 is 0.014 M.
What is Ksp=1.1x10-5?
SrCl2 is an example of this kind of salt (basic, acidic or neutral)
What is neutral?
A coffee cup calorimeter contains 120g of water at 20 degrees C. A reaction is carried out in the calorimeter, and the final temperature of the water is 35.6. (Specific heat of water is 4.18 J/g (C)). Calculate qH20 (Joules)
What is 7820 J?
The energy of 1 photon of yellow light that has a wavelength of 589 nm.
What is 3.37 x 10-19J?
A gaseous mixture made from 6 g of O2 and 9g of CH4 is placed in a 15.0 L vessel at 0 degrees C. What is the partial pressure of each gas, and what is the total pressure in the vessel?
What is 1.12 atm?
Given 4Al(s)+3O2(g)⇔2Al2O3(s) and △H=-3351 kj. Increasing the temperature will shift the reaction ____(left, right or no change) and K will _____(increase, decrease, remain the same).
What is left and decrease?
The pH of a .085 M HNO2 solution (Ka = 4.5 x 10-4) when .10 M of KNO2 is added.
What is 3.42?
The joules of heat needed to boil 40 grams of water. The heat of vaporization for water is 2260 J/g.
What is 90,400 J?
Carbon absorbs energy at a wavelength of 150. nm. The total amount of energy emitted by a carbon sample is 1.98x105 J. Calculate the number of carbon atoms present in the sample, assuming that each atom emits one photon.
What is 1.50x1023 atoms carbon?
A certain first-order reaction is 45.0% complete in 65 seconds. What are the values of the rate constant and the half-life for this process?
What is k=9.2x103 s-1 and 75 seconds?
At 2200 degrees Celsius, Kp=0.050 for the reaction: N2(g)+O2(g)⇔2NO(g) The partial pressure of NO in equilibrium with N2 and O2 that were placed in a flask at initial pressures of 0.80 and 0.20 atm, respectively.
What is PNO=7.8x10-2 atm?
The pH of a buffered solution containing .25 M NH3 (Kb = 1.8 x 10-5) and .40M NH4Cl.
What is 9.05?
The enthalpy of formation of C2H5OH, from the heats of combustion:
C(S)+O2(g)→CO2(g) △H = -394 kJ/mol
H2(g)+ 1/2 O2 (g) → H2O △H = -242 kJ/mol
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g)
△H = -1236kJ/mol
What is -278 kJ/mol