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- Pre-Dental
is nucleons=mass number?
question 43 did achiever make a mistake on the wording of the problem they said at equilibrium constant at certain fixed temp is 500L/M
shouldnt it be 500mol/L?
45. i agree with the answer but say on the actual DAT what answer would u go with if they said something like Determine the molecular weight of a gas sample having a density of 0.500 g/liter at 27 oC and 0.250 atm. (Assume R = 0.01 liter.atm/K.mol)
A.24.63
B.49.26
C.60
this is a stupid question but.....if u used the "real R" value (0.0821) u would get B but if u use R=0.01 u would get C....i had something like this last time i took the dat and i chose an anwer like B....but i was wondering if C would be a more correct answer
59. Is this correct.....In Raoult's law positive devaition occurrs when mixed liquids escapes more easily than their pure counterparts hence increasing the vapor pressure/fp nad decreasing BP/osmoitic P
if it was NEGATIVE deviation mixed liquids would not excape easiy " " hence increasing the boiling pt/osmotic pressure while decreasing VP/FP
67. PLEASE HELP WITH THIS ONE
What is the theoretical voltage required to electrolyze molten NaCl that forms Cl2(g) at anode and Na(l) at cathode, given Eo for Na+/Na is 2.71 V and Eo for Cl2/Cl- is +1.36 V?
they way i understand is oxidation occurs in anode...ruduction in cathode
therefore cl--cl2 has epotential of -1.36
and at cathode
Na+ + e---) has E potential of -2.71....but this E is smaller than the oxidation....sholdnt E potential for reduction be greater than Oxidation
then they went on to say -2.71 + -1.35=-4.07(nonspontaenous)
External potential required to carry out said elctrolysis:4.07...i dont gett his part either
68.the solution says alkaline earth metals are SMALLER than alkaline metalsfrom same period but if u compare K and Ca....isnt Ca slightly bigger than K by their mass values
question 43 did achiever make a mistake on the wording of the problem they said at equilibrium constant at certain fixed temp is 500L/M
shouldnt it be 500mol/L?
45. i agree with the answer but say on the actual DAT what answer would u go with if they said something like Determine the molecular weight of a gas sample having a density of 0.500 g/liter at 27 oC and 0.250 atm. (Assume R = 0.01 liter.atm/K.mol)
A.24.63
B.49.26
C.60
this is a stupid question but.....if u used the "real R" value (0.0821) u would get B but if u use R=0.01 u would get C....i had something like this last time i took the dat and i chose an anwer like B....but i was wondering if C would be a more correct answer
59. Is this correct.....In Raoult's law positive devaition occurrs when mixed liquids escapes more easily than their pure counterparts hence increasing the vapor pressure/fp nad decreasing BP/osmoitic P
if it was NEGATIVE deviation mixed liquids would not excape easiy " " hence increasing the boiling pt/osmotic pressure while decreasing VP/FP
67. PLEASE HELP WITH THIS ONE
What is the theoretical voltage required to electrolyze molten NaCl that forms Cl2(g) at anode and Na(l) at cathode, given Eo for Na+/Na is 2.71 V and Eo for Cl2/Cl- is +1.36 V?
they way i understand is oxidation occurs in anode...ruduction in cathode
therefore cl--cl2 has epotential of -1.36
and at cathode
Na+ + e---) has E potential of -2.71....but this E is smaller than the oxidation....sholdnt E potential for reduction be greater than Oxidation
then they went on to say -2.71 + -1.35=-4.07(nonspontaenous)
External potential required to carry out said elctrolysis:4.07...i dont gett his part either
68.the solution says alkaline earth metals are SMALLER than alkaline metalsfrom same period but if u compare K and Ca....isnt Ca slightly bigger than K by their mass values
