Tuesday
December 10, 2013

# Posts by Alan

Total # Posts: 320

Biology / Biochemistry
How will the conformation of an Enzyme (a protease) be affected when the amino acid residue is substituted with glutamate instead of glutamine?

Chemistry
Beside the usual method of titrating with KMNO4, what is/are the alternative method/s to test for the presence/amount of oxalate in a compound?

math
-8<3x-5<-4 -8<3x-5 and 3x-5<-4 3x-5>-8 3x<1 3x>-3 x<1/3 x>-1 therefore 1/3>x>-1

Chemistry
Is Al(OH)3 soluble in KOH or K2C2O4•3H2O?

Math 30
Yes, 2^9.

Chemistry
Why is heating required for this formation: 6NaOH (aq) + Al2(SO4)3 (aq) ¨ 2Al(OH)3 (s) + 3Na2SO4 (aq)? Wouldn't freezing favour the formation of Al(OH)3 since freezing lower the KSP and more Al(OH)3 would precipitate?

Chemistry
This is the equation for the formation of Al(OH)3: 6NaOH (aq) + Al2(SO4)3 (aq) ¨ 2Al(OH)3 (s) + 3Na2SO4 (aq) Would any side products be formed if NaOH was added quickly into Al2(SO4)3?

Chemistry
During the preparation of K3[Al(C2O4)3].3H2O, NaOH was added slowly and with stirring over an approximately 10-minute period to a solution of Al2(SO4)3 solution. The combined solution was heated to almost boiling and left to stand for a few minutes. 1. Why does NaOH added slow...

math
I calculated the average number of crashes over a 240 week period to be .0875... what formula do I use to calculate the probability that at least 19 crashes would occur over that 240 week period?

Physics
A room has a volume of 120 m^3. An air-conditioning system is used to replace the air in the room every twenty minutes, using ducts that have a square cross ection. Assuming that air can be treated as an incompressible fluid, calculate the length of a side of the square if the...

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