Tuesday
October 21, 2014

Posts by Miaow


Total # Posts: 27

Biochem
The Na –glucose symport system of intestinal epithelial cells couples the \"downhill\" transport of two Na ions into the cell to the \"uphill\" transport of glucose, pumping glucose into the cell against its concentration gradient. If the Na ...
November 2, 2013

Physics
I wondered if someone would check my work concerning an Atwood's Machine. (I am led to believe the answers for these two questions should be the same but I'm not coming out that way.)Thank you! 8.) Caluclate the tension in the Atwood's Machine string for the case ...
September 22, 2012

Physics
Would someone please check my work ands let me know if I am right? (We are going to do this as a group but I'd like to attempt it on my own first.) Thank you! Suppose a soccer player kicks the ball from a distance 30 m toward the goal. Find the initial speed of the ball if...
September 6, 2012

Physics
Could someone please check another one of my answer for me? Thank you! A commuter backs her car out of her garage with an acceleration of 1.40 m/s2. (a) How long does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what is her ...
September 2, 2012

Physics
Thank you very much! I wondered if I should switch to km/hr. And, I was SURE I was wrong on B but AMAZED I was right on C. :)
August 31, 2012

Physics
Could someone please review my answers and tell me if I am on the right track? Thank you! A student drove to the university from her home and noted that the odometer reading of her car increased by 12.0 km. The trip took 18.0 min. (a) What was her average speed? (b) If the ...
August 31, 2012

Chemistry
Thank you for explaining! I think the balancing bit is my fault. I am getting tired and stupid. Time to go to bed and look at this closer in the morning. I thank you for all your help this semester.
May 20, 2012

Chemistry
I HAD to have actually heard "flip the less positive" didn't I? When I work it that way it seems to make sense.
May 20, 2012

Chemistry
More finals review please... Ag^+ + 2e^- --> Ag E^nought = 0.800V Sn^4+ + 2e^- --> SN^2+ E^nought + 0.154V balanced equation: 2Ag^+ + Sn^4+ --> 2Ag + Sn^2+ E^nought cell = cathode - anode I thought I heard say that I had to flip the "less negative" half ...
May 20, 2012

Chemistry
P.S. I have heard that you are either a Gen Chemist or an Organic Chemist. (I am hoping to heck I am an organic chemist! But, I did well in Gen Chem, thanks in part to you.)
May 13, 2012

Chemistry
That's okay, I'm sure you're better at it than I am. And you are good at leading me in the right direction; I appreciate that. It'll all work out.
May 13, 2012

Chemistry
Thank you again, I really hope you are going to be around this summer for Organic :)
May 13, 2012

Chemistry
Got another practice question but I'm really stumped on this one: If the [ZnCl4]^2- ion is diamagnetic what must its structure be and why - octahedral, tetrahedral or square planar? I know that diamagnetic means that all its electrons are paired and that makes it low spin...
May 13, 2012

Chemistry
Thanks so much :)
May 13, 2012

Chemistry
Working on a practice question for finals so I really want to understand how this works: What is the coordination number of mercury in K2[HgI4]? I say that mercury's coordination number is 4 because I^- is a monodentate ligand. Does the potassium affect the coordination ...
May 13, 2012

Chemistry
Stuck again... "Determine the charge on the complex: diaquadichloroethylenediaminecobalt(III)" I'm having problems even writing a formula for this one! Is it [Co(2)(NH2CH2CH2NH2)Cl]Cl ??? Maybe if I could figure out the formula I'd be better at figuring out ...
May 7, 2012

Chemistry
YAY! Thanks, that was a tough one. Formula didn't matter so much as figuring out the charge. +1 was it! You were a wonderful help, as always!
May 7, 2012

Chemistry
Stuck again... "Determine the charge on the complex: diaquadichloroethylenediaminecobalt(III)" I'm having problems even writing a formula for this one! Is it [Co(2)(NH2CH2CH2NH2)Cl]Cl ??? Maybe if I could figure out the formula I'd be better at figuring out ...
May 7, 2012

Chemistry
That was it! Apparently it has been WAY too long since I did order of operations but I have refreshed myself now. I should have known better! Thank you for your help.
April 29, 2012

Chemistry
Doesn't make sense to me either but I can't figure it out :( The way I arrived at that answer was: E=[.32-(8.3145x334.15)/(2x96285)]3.851 E=[.32-(2778.29)/192570)]3.851 E=(.32-.014427)3.851 E=(.305573)3.851 E=1.177 It's not right but for the life of me I don't ...
April 29, 2012

Chemistry
Please check a Nernst equation for me? Calculate the cell potential for the following reaction as written at 61 °C, given that [Zn2 ] = 0.800 M and [Fe2 ] = 0.0170 M. Half reactions: Zn-->Zn^2+ + 2e^- (potential= -0.76)(anode) Fe^2+ + 2e^- -->Fe (potential= -0.44) (...
April 29, 2012

Chemistry
That was it! As always, thank you :)
April 15, 2012

Chemistry
In a particular redox reaction, BrO– is oxidized to BrO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Two half reactions: 1.) Cu^2+ --> Cu^+ 2.) BrO^- --> BrO3^- Balanced: 1.) Cu^2+ +e^- --> Cu^+ 2.) BrO...
April 15, 2012

Chemistry
Thank you VERY much!
April 6, 2012

Chemistry
Consider the decomposition of a metal oxide to its elements, where M represents a generic metal: M2O3 (s) <=> 2M (s) + 3/2 O2 (g) Given a delta Gf: -770 Kj for the M2O3 0 Kj for the M 0 Kj for the O2 What is the standard change in Gibbs energy for the reaction, as ...
April 6, 2012

Chemistry
Oh geez, thank you SO much! And so quick!
April 1, 2012

Chemistry
At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.56. What is the Ksp of the compound at 22 °C? I have found my [OH-] concentration (3.63x10^-4) but I'm not sure I'm ...
April 1, 2012

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