Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
poof
verify that the function is a solution of the initial value problem?
y=(1+2 ln x/x^2)+1/2; y'=(x^2-2x^2y+2)/x^3; y(1)=3/2
what am I doing wrong that I am getting the extra x^2 on the right hand side?
thanks!
1 AnswerMathematics3 years agoWhich answer allows you to get voltage from an electrochemical cell?
a. K > 1
b. Q > 1
c. E^0 = 0
d. Delta S = 0
please explain I've been trying to figure it out for so long but it must not be in my notes!
1 AnswerChemistry3 years agoWhat is the net ionic equation for 0.1 M potassium iodide + 0.02 M potassium iodate? the oxidation half reaction? Reduction half reaction?
If you add 1 drop of 6 M HCl to this solution, it forms a black precipitate. Why is this?
is the oxidation half: 10 I^- --> 5I2 + 5 e
reduction: 2I^+5 + 5e --> I2
net: 10I^- + 2I^+1 --> 5I2 + I2?
I am confused by the reduction half especially.
thank you!
1 AnswerChemistry3 years agoHow do you know that 0.5M NaBrO2 is more basic than 0.5M NaIO4?
1 AnswerChemistry3 years agoWhen is a solid to be less soluble at a higher temperature?
Is the Ksp favorable in this case? Explain.
I don't think I fully understand what this question is asking.
1 AnswerChemistry3 years agoWhat is the average rate, expressed in atmxs^-1 for the disappearance of O3?
I am so confused about how to figure this out but I believe the correct answer is A.
1 AnswerChemistry3 years agoConsider the phase diagram, which applies?
I am certain that A and C do not apply but unsure about B? Thanks!
1 AnswerChemistry3 years agohelp evaluating the double integral?
1 AnswerMathematics3 years agoHelp understanding the rate determining step?
The correct answer is step 3 but if N2O2 and N2O are both intermediates and step 3 is the slow step, wouldn't the rate law be rate=k[H2]^2, (since rate is determined by the slow step and the previous step) which would only be 2nd order overall not 4th? I am so confused !
1 AnswerChemistry4 years agowhy does adding Al(NO3)3 (aq) to Al(OH)3 (s) <----> 3 OH- (aq) + Al 3+ (aq) shift the equilibrium towards the reagents?
From looking at the problem, I would think that adding Al(NO3)3 (aq) would be similar to adding more Al(OH)3 (s) and would shift it towards the products? I have been trying to figure this out and am very confused
1 AnswerChemistry4 years agoDetermine the percent dissociation and the pH. How will adding more CH3CH3COOH affect the [H+]? (up or down?)?
CH3CH3COOH ----> H+ + CH3CH2COO-
A 0.275 molar solution of Propanoic acid has a [H+]=0.00191 molar.
1 AnswerChemistry4 years agoHelp determining concentrations at equilibrium when only given K and not the initial concentration of the reagent?
I have been following all of my examples from class as much as possible but we have never done an example quite like this and I am so confused! thank you for your help in advance :)
1 AnswerChemistry4 years agoHow to determine equilibrium concentrations when given the value of K and not the initial concentration of the reagent?
I have been following all of my examples from class as much as possible but we have never done an example quite like this and I am so confused! thank you for your help!
1 AnswerChemistry4 years agohelping with determining equilibrium shifts?
Please let me know if what I have written is not correct! I kind of just taught this to myself and want to make sure I understand it correctly! thank you!
2 AnswersChemistry4 years agoHelp predicting the shift in equilibrium?
So I understand that adding CO2 will shift it towards reagent and adding CaCO3 will shift it to product, but how do you determine the shift caused by either lowering or increasing the volume if both sides of the equation are equivalent in volume? As in both sides have 3 moles. if one side had less volume, then decreasing the volume would shift it towards that side but how do you determine that for this example? thank you!
1 AnswerChemistry4 years agoHow to find the rate law when only given the rate determining step?
I know exothermic means the products have less energy than the reactants, hence the reaction coordinate I drew, but I am struggling to determine the rate law because I am unsure how to figure out the order of reactions for both the reactants when only given one step from the reaction?
1 AnswerChemistry4 years agoHelp with Lagrange Multipliers: find max and min value by finding the extreme values of the function subject to the constraint:?
f(x,y,z) = 4x + 4y + 5z subject to 2(x^2) +2(y^2) +5(z^2) = 21. Please explain I am so confused!
1 AnswerMathematics4 years agoHelp with Lagrange Multipliers: find max and min value by finding the extreme values of the function subject to the constraint:?
f(x,y)= 2x+10y subject to (x^2)+(y^2)=26. please explain, I am so confused and keep getting insane fractions for my answer :(
1 AnswerMathematics4 years agoFind the points on the surface y^2 = 64+xz that are closest to the origin.?
I am so confused! Please explain the steps
3 AnswersMathematics4 years ago