Thursday

April 17, 2014

April 17, 2014

Number of results: 142,228

**geometry again again again again**

Thank you but I just don't understand the whole equation thing tho.
*Sunday, September 27, 2009 at 2:40pm by Monique N.*

**geometry again again again again**

I know you've helped me alot but is there anyway that you can help me understand two more problems. Geometry andGeometry again again again again
*Sunday, September 27, 2009 at 2:40pm by Monique N.*

**Chemistry**

It's that equation again.
*Saturday, October 20, 2012 at 11:16pm by DrBob222*

**Who is correct? (chemistry issues here)**

Okay then. Apparently from your statement, it seems as if you feel I will bring it up again and again and again. I will just mute myself.
*Tuesday, May 6, 2008 at 10:00pm by ~christina~*

**chemistry**

The Clausius-Clapeyron equation again.
*Monday, June 21, 2010 at 2:04pm by DrBob222*

**ap chemistry**

The HH equation again.
*Tuesday, February 4, 2014 at 6:57pm by DrBob222*

**chemistry**

Use the Arrhenius equation and solve for Ea. You might use for k something like 1 L sours/64 hours etc. Use the same equation again but change the T to 37. Post your work if you get stuck.
*Wednesday, April 11, 2012 at 5:01pm by DrBob222*

**Chemistry**

Awesome Thanks So Much. But.. how do you know that in the Nernst Equation n = 6 Besides that it makes sense.. thanks again!
*Wednesday, June 10, 2009 at 3:39pm by Joe*

**chemistry**

You use 1st order equation of ln(No/N) = kt and solve for k. Use the second time period to calculate k again. If k is the same, then this is a first order reaction and you can use that equation on the other experiment. If k is not the same; you assume it is a second order ...
*Saturday, February 18, 2012 at 11:47pm by DrBob222*

**Chemistry help**

I would use the Clausius-Clapeyron equation and solve for delta Hvap. Using that number, then solve for vapor pressure of the organic solvent at 35C (again using the CC equation). Then mole fraction = Psolvent/Ptotal.
*Sunday, February 13, 2011 at 5:46pm by DrBob222*

**Chemistry**

Thanks Dr.Bob!! I was then able to plug into the second equation and found the concentration of calcium! You were great help! Thanks again :)
*Saturday, November 2, 2013 at 6:28pm by DC*

**geometry again again again again**

this is 10th grade math. Im not very smart just to let you know. But thank you anyways
*Sunday, September 27, 2009 at 2:40pm by Monique N.*

**algebra**

1)Write an equation for the parabola with focus (1,3)and vertex(0,3) answer= x= 1/4(y-3)^2 2)Write an equation for a circle if the endpoints of a diameter are at (1,1)and(1,-9) answer= (x-1)^2+(y+4)^2=25 3)Which is the equation of a circle with center (0,1)and radius 2 units? ...
*Tuesday, August 21, 2007 at 5:09pm by Marissa*

**CHEMISTRY HELP**

thanks sorry i posted it again when i didnt get an answer for a long time thanks again
*Wednesday, December 10, 2008 at 7:05pm by lyne*

**Chemistry again**

PbO2(s) + Pb(s) + H2SO4(aq) PbSO4(s) + H2O(l) Can anyone help me identify what the redox reactions are for this equation? I don't understand how to do it when there are more than 2 chemicals.
*Wednesday, February 13, 2008 at 7:16pm by Alex*

**Chemistry**

I got the first part when I have to find the ratio for base to acid. I didn't know where to go from there. I tried using the C1V1=C2V2 equation but again I am lost.
*Sunday, September 19, 2010 at 1:58pm by HELP!!!*

**solve equation**

No. You need to subtract 7 from both sides of the equation. Please try again.
*Saturday, January 30, 2010 at 2:11pm by Ms. Sue*

**chemistry**

Let's do the ideal gas law one. P = nRT/V n = 1 mole T = 77.0 + 273.2 = 350.2 K V = 35.0 L R = 0.08206 L atm/mole K P = 0.821 atm It looks like the book is right. I suspect that you may be using the wrong value for R or are not carrying enough significant figures. Try it again...
*Sunday, December 30, 2007 at 6:43pm by drwls*

**college chemistry**

Again you need to check you have the correct equation as you have O atoms on the RHS but none on the LHS.
*Thursday, November 4, 2010 at 5:04am by Dr Russ*

**chemistry**

I have answered three times here and nothing posts. Try again. The balanced equation is Na2CO3 + 2HCl ==> 2NaCl + H2O + CO2
*Wednesday, August 3, 2011 at 10:39am by Drbob222*

**Math**

How do I solve this equivalent equation? 5x +2 < 17 (again the <is underlined) Do I subtract 2 from each side so it would read 5x < 15 (again the < is underlined) than divide each side by 5 so the x < 3 (again the <is underlined) is the answer? Also, how do I...
*Wednesday, April 9, 2008 at 10:17pm by Tyler*

**Chemistry Equation(again!)**

Posted by chrissy on Saturday, January 6, 2007 at 1:23pm. In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. For Further Reading Chemistry Equation - DrBob222, Saturday, January 6, ...
*Saturday, January 6, 2007 at 8:32pm by chrissy-needs Chem help ASAP*

**Algebra 1**

First put the equation 2x = 9y + 4 into slope-intercept form - you will basically be solving for y (y=mx+b). That will give you "m," which is your slope. Parallel lines have the same slope, so you now have your slope for your new line too. Next, plug in all of your numbers to ...
*Thursday, September 24, 2009 at 8:28am by Ceres*

**Math**

I don't even see your x in the equation that you provided. Check the question again and then use the coordinate (4, 2) to write an equation in point-slope form... y – y1 = m(x – x1)
*Sunday, January 24, 2010 at 4:48pm by Alyssa*

**Algebra**

I am stuck, pleas help, i have the example but I am still not able to figure it out... Find the value of X...5/x+6+2/x^2+7x+6=3/X+1 Find the value of X...2/5=x-2/20 First, get the X terms on one side of the equation and the numbers on the other. 2/5=X-2/20 2/5+2/20 = X Change ...
*Wednesday, May 23, 2007 at 10:38am by Helpless Again*

**math**

B. your equation is right, so X=13 Or, you can look at it as follows. If the average is 16, the odd numbers are evenly spaced above and below 16: 13,15,17,19 D. again, your equation is correct. x=83 again, it's an average problem. The numbers are evenly spaced around 84: 83,84,85
*Saturday, July 13, 2013 at 11:01am by Steve*

**maths**

write the equation in slope-intercept form. then graph the equation. 1. 6x-4y=3 2. 2y+5x=10 can you please help me with at least one of them? thanks! also, where it says 'then graph the equation', I know we can't graph here, so you can ignore that. but if you know any other ...
*Saturday, October 3, 2009 at 5:05pm by regina*

**chemistry**

Add equation 1 to the reverse of equation 2 to equation 3. That will give you twice the equation you want and you can take half of it later. Add kJ/mole for equation to the negative of equation 2 to the kJ for equation 3. All of that together gives twice what you are looking ...
*Sunday, April 11, 2010 at 3:57pm by DrBob222*

**chemistry**

I can't answer your question but I may be able to offer some insight. The equation you wrote is, as you say, an acid solution. Remember that the standard potential is for 1 M H^+ and acid rain isn't close to that. The equation offered up as the answer by the book is for an ...
*Friday, February 15, 2008 at 5:28pm by DrBob222*

**Chemistry Equation(again)**

What I wrote is the balanced ionic equation. The ++ are written as exponents and could be written as we usually do it as Cu^+2 + Zn ==> Zn^+2 + Cu. For the molecular equation, it is Cu(NO3)2 + Zn ==> Zn(NO3)2 + Cu So the ionic equation for adding copper(II)nitrate to ...
*Sunday, January 7, 2007 at 7:32pm by DrBob222*

**Chemistry**

I just fixed the equation above but here it is again 2NOBr <-> 2NO + Br2 (delta)H = +61.1 kJ I thought b and e are true however the computer keeps saying that answer is wrong.
*Tuesday, September 29, 2009 at 7:19pm by Ava*

**grade 12 chem - check my answer again please**

Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS + 7O2 --> 2Fe2O3 + 4SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...
*Saturday, May 24, 2008 at 9:01pm by Sarah H*

**geometry again again again again**

If angle AFB= 8x-6 and angle BFC= 14x +8, find the value of x so that angle AFC is a right angle.
*Sunday, September 27, 2009 at 2:40pm by Monique N.*

**Math**

No, it is not because when you plug in x for the first equation you get -1 as y, not 1. And for the second equation when you plug in 5 for x you get -1 again, not 1.
*Monday, March 30, 2009 at 5:24pm by eStone*

**precal**

The smaller of 2 numbers is 10 less than 4 times the greater number. The bigger number is 19 more than the smaller one. If x is the smaller number one equation is: a)x+y=19 b)x=19-y c)y=x+19 d)x=y+19 I'm almost positive it is d I just want to check. A second equation is: a)x=...
*Tuesday, January 16, 2007 at 11:08pm by eragon*

**geometry again again again**

please go to this website called angles
*Sunday, September 27, 2009 at 2:36pm by anna*

**Math **

What is an example of an equation for Celsius to Fahrenheit? I completely forgot the equation since i spend too much time doing summer things, but this is for Summer School, Please help me understand it again.
*Monday, June 11, 2012 at 9:22pm by Losa*

**Algebra 1**

Just substitute (-3x-8) for y in the first equation and solve for x. Use that solution to find y. Check by inserting both values into the first equation again. I hope this helps. Thanks for asking.
*Tuesday, September 25, 2007 at 7:01pm by PsyDAG*

**Chemistry**

Here's one last equation I can't balance: Al{subscript 2}(SO{subscript 4}){subscript 3} + ZnCl{subscript 2} -> AlCl{subscript 3} + ZnSO{subscript 4} Please help, and thanks again.
*Monday, October 13, 2008 at 6:53pm by Anonymous*

**college chemistry!! need help now!!**

I am irked. GK gave you a correct answer 20 min ago, and you posted again. Besides being rude, it wastes volunteers time. Please dont do that again.
*Sunday, October 19, 2008 at 9:51pm by bobpursley*

**Chemistry**

Use equation as is (using arrows to separate reactants from products is a MUST if you are to do this properly) and the H as is. Reverse equation 2 and change the sign of H2. Now add equation 1 to the new equation 2 and add H1 to the reversed equation 2 for delta Hf for the ...
*Wednesday, May 13, 2009 at 2:36pm by DrBob222*

**geometry again again again again**

What grade level is this geometry ? Doing these kind of questions without knowing how to solve basic equations would be like learning how to play hockey without knowing how to skate.
*Sunday, September 27, 2009 at 2:40pm by Reiny*

**algebra 2**

Square both sides. Then you'll have one square root on the left hand side. Simplify the equation and square again to obtain a very simple equation.
*Thursday, April 10, 2008 at 9:22pm by Count Iblis*

**English**

Hello. Please help me with a few questions. 1) Which is the correct position of "again" in the sentence: "They have (again)gathered (again)at the square (again)"? 2)Does the phrase "the allegations doubt his integrity" have the same meaning as "the allegations question his ...
*Sunday, May 15, 2011 at 4:11am by Ilma*

**chemistry**

Reverse equation 2 and equation 3 and add them to equation 1. See if that isn't the equation you want. When you reverse an equation you change the sign for delta H for that reaction. Then add all of the DH values.
*Wednesday, January 25, 2012 at 1:05am by DrBob222*

**math (other one is wrong equation)**

sorry, i posted the wrong equation in the other message 5^(x+3)-5^(x+2)=4 again, i know the answer is x = -2, but i'm not sure how to get there in steps.
*Sunday, January 4, 2009 at 9:16pm by Hared*

**algebra 2**

Square both sides. Then bring all terms except the remaining square root to one side and then square again. Put x^2 = t in that equation and solve the quadratic equation in t.
*Tuesday, March 18, 2008 at 9:53pm by Count Iblis*

**Last equation question**

where would I graph this?? once again I hate fractions and equations... graph the equation x=7/2 can someone help me figure this out thanks last question of the day..
*Thursday, October 8, 2009 at 6:58pm by Kathy*

**geometry again again again again**

right angle means 90º so 8x-6 + 14x +8 = 90 22x = 90 + 6 - 8 22x = 88 x = 4
*Sunday, September 27, 2009 at 2:40pm by Reiny*

**chemistry**

Add equation 1 to the reverse of equation 2, then add twice equation 3 and twice equation 4. Cancel atoms/molecules common to both sides and check to make sure you have the equation you want. Don't forget to change the sign of any delta H value for which the equation was ...
*Thursday, October 29, 2009 at 7:59pm by DrBob222*

**Chemistry**

The equation doesn't make sense and the question doesn't make sense. Try correcting one or both and we can try again.
*Thursday, May 6, 2010 at 5:39pm by DrBob222*

**algebra**

I made a typing error on last post so I thought I would try again . thanks for your help. Use the percent equation to answer the following. solve the percent equation for b. percent equation is a= p% . b i saw in text it set up as cross products a/b = p/100. I thought about ...
*Sunday, December 4, 2011 at 4:25pm by ann*

**chemistry**

So I assume you will have several groupings; i.e., group those with similar melting points, group again with solubility in water, again with solubility in ethanol, and another by conductivity.
*Monday, January 19, 2009 at 2:24pm by DrBob222*

**chemistry**

I saw a girl by the name of Abgail ask the same question !! So I'll ask you again!! help me and also her!! What is the chemical equation for: 1. Cyclohexane and Potassium Manganate VII 2. Cyclohexen and Potassium Manganate VII
*Tuesday, May 18, 2010 at 8:02pm by De Diva*

**geometry again again again**

what is the website called.
*Sunday, September 27, 2009 at 2:36pm by Monique N.*

**definition**

Then read it again ... and again and again, if you need to. It's not 4.
*Wednesday, April 24, 2013 at 6:54pm by Writeacher*

**chemistry **

Label the equation you have as 1, 2, 3. Use equation 1 as is. Use equation 2 as is. Reverse equation 3 (change the sign of DH when you reverse an equation), than add all of them and the new DHs. Check to make sure the equation is what you wnat, the It will be DH(1) + DH(2...
*Monday, October 25, 2010 at 2:30pm by DrBob222*

**Pre-Calculus**

Try solving it iteratively: if g(X)=0, then X^3-3X+1=0, so rearrange the equation to read X = (3X-1)^(1/3) Not put X = 2, and evaluate the function. You'll get about 1.71. Feed that into the equation again, and you'll get about 1.60. Keep going for a few more iterations until ...
*Sunday, August 31, 2008 at 2:42pm by David Q*

**Chemistry **

Reverse equation 1 and add to equation 2. That will give you the equation desired at the end. Reverse the sign for delta H when the equation is reversed.
*Friday, February 18, 2011 at 12:36am by DrBob222*

**Calculus again**

Find the equation of the tangent to y=2-xe^x at the point where x=0 So I found the first derivative by doing the sum rule and product rule. I got e^(x)(x-1) Then I found the slope by substituting 0 for x and got -1. Then I found y by substituting 0 into the original equation ...
*Thursday, June 5, 2008 at 10:30pm by Sam*

**Physics**

Once again, it is true again and again: Momentum before = momentum after if no EXTERNAL force on system, like here: 0 = 5 v + 3 * 3 v = -9/5 = -1.8
*Monday, February 3, 2014 at 1:58pm by Damon*

**algebra again**

Write an equation that passes through the points (4, 3) and (2, -2) I have -2 -3 is -5 and 2-4 is -2 so y equals -5/2x plus b. I put in 2,-2 into the equation to get the y intercept, so 2 equals -5/2 times 2 plus b -5/2(2) is -10/-4 reduce to -5/-2 Now add 5/2 to -2 Please ...
*Saturday, September 26, 2009 at 4:46am by Elisa*

**Chemistry - Equations**

Sorry about that. I pushed the submit button before I finished the last post. Here are the first TWO. 7. in 2CO(grams) + O2(grams) => 2CO2(grams), what is the ratio of moles of oxygen used to moles of CO2? Look at the equation. The coefficients tell you how many mols react ...
*Thursday, January 31, 2008 at 8:13pm by DrBob222*

**Help w/this one again(Math!!)**

Write one or two equations to represent the situation below. Solve the equation(s). Show all your work. Two cars leave town going in opposite directions. The car heading north travels at 55 mph. The car heading south travels at 75 mph. How long will it take them to get 715 ...
*Tuesday, November 7, 2006 at 6:37pm by Danny*

**ALGEBRA again still need help !**

need help solving this word problem, converting from words to an equation 48 equals a number increased by 6, and the sum, all multiplied by 5. I have the answer, but I am unable to set up an equation. answer - x=3 3/5
*Thursday, October 9, 2008 at 10:17pm by Rose*

**chemistry**

Reverse equation 1 (change sign of delta H). Multiply equation 2 by 2. Add. Check the equation to make sure that's what you get.
*Tuesday, June 14, 2011 at 10:37pm by DrBob222*

**geometry again again again**

do you happen to know how to do geometry again again???
*Sunday, September 27, 2009 at 2:36pm by Monique N.*

**Chemistry**

I think what you want to do is multiply equation 1 by 2 and add to equation 2. I believe that will give you the equation you want. To find the Kp value, it will be (Kp1)^2*Kp2 = ?
*Monday, March 5, 2012 at 10:14pm by DrBob222*

**geometry again again again**

Thank You So Much!!!!!!!!!!!!!!!!!!!!!
*Sunday, September 27, 2009 at 2:36pm by Monique N.*

**math**

use product rule, then substitute value of x in dy/dx. the obtain then find equation of tangent y=mx+c. For normal, gradient of curve*gradient of normal=-1 find gradient of normal from equation and once again obtain normal equation in y=mx+c form
*Thursday, October 15, 2009 at 7:45pm by Salman*

**Help again...Math!!**

Two cars leave town going in the same direction. One travels 55 mph and the other travels 65 mph How long will it take before they are 180 miles apart? Hint: We do know that one car is 180 miles ahead of the other, so the slow car's distance can be represented by " d " and the...
*Wednesday, November 15, 2006 at 4:26pm by Jessica*

**physics again...**

yes, in my first equation, the "s" is distance, or in this case, height.
*Thursday, February 28, 2008 at 9:03pm by DanH*

**math**

Check your equation again and see if you typed it correctly.
*Saturday, May 2, 2009 at 11:41am by RickP*

**Summer School Calculus**

Another one for you :P, add these two vectors using trigonometry (again)... 9N[S2W] and 11N[N31W]...Again, I am confused about the angles, I am not sure what value I should use for the cosine and sine law. THANKS AGAIN!!
*Sunday, June 29, 2008 at 7:03pm by Derek*

**chemistry**

1. Write the balanced molecular equation. 2. Break each component into ions to obtain the complete ionic equation. 3. Cancel ions common to both sides of the equation to obtain the net equation.
*Thursday, October 4, 2012 at 5:46pm by DrBob222*

**English**

1. Can we meet again one day? 2. Can we meet again oneday? 3. Can we meet again some day? 4. Can we meet again someday? (Which ones are grammatical? Which one is commonly used? Thank you. Have a good day!)
*Wednesday, December 14, 2011 at 4:35am by rfvv*

**CHEMISTRY**

Here's one last equation I can't balance: Al{subscript 2}(SO{subscript 4}){subscript 3} + ZnCl{subscript 2} -> AlCl{subscript 3} + ZnSO{subscript 4} Please help, and thanks again. Response Al2(SO4)3 + 3ZnCl2 ---> 2AlCl3 + ?___ZnSO4 Why do you have "?____" before the ZnSO4?
*Monday, October 13, 2008 at 7:50pm by Anonymous*

**Algebra-HELP**

y=f(x)=x^2-x-6 The y-intercept is the value of y when x=0. Substitute x=0 in the above equation to find the y-intercept. The x-intercept is to find the roots of the equation, when y=0, or f(x)=x^2-x-6=0 By factoring f(x) into f(x)=(x-3)(x+2) you should be able readily find the...
*Wednesday, October 12, 2011 at 11:36pm by MathMate*

**Chemistry -- to Dr.Bob**

wait.. im doing it again and getting this wrong.. just what did i need to correct again? are all my steps okay i just need to change my moles Acetic acid value? or is something wrong.
*Friday, May 2, 2008 at 9:41pm by Amy*

**DRWLS CAN YOU ANSWER**

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 THE ANSWERS ARE3,-2,1 HOW DID THEY GET THAT ANSWER. This can be solved a number of ways. 1) subsitition 2) determinants 3) matricies. Substution: x= 1-y y= z+3 or ...
*Sunday, October 22, 2006 at 8:55pm by Jasmine202005*

**chemistry**

write the balanced formula equation and the net ionic equation for the reaction of sodium hydroxide with hydrochloric acid. Formula equation.............. net equation.............
*Sunday, October 30, 2011 at 7:40pm by denis*

**Physics**

Stuck again. The paper just says that the position of an object is given by s(t)=t^3. When T=5sec find A. Position B. Velocity C. Acceleration I'm trying to use the "position equation" which is s=1/2 a t^2 = Vot However, what do I solve the equation for? It seems like none of ...
*Tuesday, October 28, 2008 at 7:27pm by Jack*

**chemistry**

Sorry, I meant to mention that all the Fe in the equation is Fe3+ (maybe that's obvious from the equation...). In which equation is the SCN not balanced? Mine or Kara's? And how did you get to this answer? Thank you so much.
*Sunday, March 29, 2009 at 6:24pm by lholmq*

**Chemistry**

For the equation give the formula equation, ionic equation, and the net ionic equation after predicting the products and balancing. Using the solubility rules to indicate solid or aqueous each formula. AgNO3 + NaCl
*Wednesday, October 30, 2013 at 12:50pm by Cindy*

**Chemistry - Le Chatelier's Principle**

I don't know what it is you don't understand. Frankly you seem to understand it very well. You add H3O^+ and the rxn shifts to the right producing more dichromate which is what you want. The equation is already there. That is the initial equation, the intermediate equation, ...
*Sunday, March 9, 2014 at 1:30pm by DrBob222*

**AP Chemistry**

What is meant by minimum and maximum energy problems. Are there different equations to find them. What does this conceptually mean? * This is dealing with quantum chemistry such as plancks equation, and debroglie equation.
*Thursday, November 18, 2010 at 10:48pm by qwerty123*

**Chemistry**

Well, it has a lot to do with it since instructions for working a limiting reagent problem is just an expanded set of rules (some don't apply) when doing a simpler stoichiometry problem. I have been handy tonight with passing out answers I've given, especially for limiting ...
*Monday, April 5, 2010 at 11:14pm by DrBob222*

**Algebra 1**

A design calls for a rectangular garden with an area of 180 square feet. If the length is to be 3 feet more than the width, set up an equation and solve that equation to find the dimensions of the garden. I drew a sketch and labeled the width "w" and the length "w+3" my ...
*Wednesday, May 6, 2009 at 5:57pm by Meloney*

**Chemistry**

So I thought i finally had figured out how to balance these equations but now this one with the formula in it has confused me again. Can you help with the next steps in balancing this equation? Maybe if I can get the answer to this one I can complete my other questions. O3 + H...
*Monday, March 12, 2012 at 10:55pm by Susan*

**math**

Check your second equation again. It has two "Y" terms. Did you substitute a Y for an X?
*Tuesday, September 14, 2010 at 10:29am by drwls*

**Chemistry **

The basic problem here is that you are trying to use the Henderson-Hasselbalch buffer equation to solve a problem that is not a buffer. Your solution is not a buffered solution problem. There is an excess of NaOH when reacted with HCl and the pH is determined by the excess OH ...
*Monday, May 3, 2010 at 2:50pm by DrBob222*

**Chemistry PLZ HELP!!!!!**

I'm 16 and graduating in May. But im in advanced chemistry i dont know why but i am :) Thanks again.
*Monday, April 9, 2012 at 3:03pm by Maci*

**Math**

3x=-12y+15 and x + 4y=5 These two equations are the same. There is a y for any x. Y=6x+2 and 3y-18x=12 3y = 18 x + 12 is y = 6 x + 4 These are parallel lines that never intersect, no solution x-2y=6 and 3x – 6y =18 again divide equation 2 by 3 and get x - 2 y - 6 the two ...
*Monday, January 13, 2014 at 6:51pm by Damon*

**geometry again again again**

Two angles are supplementary. one angle measures 12 degrees more than the other. Find the measures of the angles.
*Sunday, September 27, 2009 at 2:36pm by Monique N.*

**chemistry(balance equation)**

hi!i am a f4 student in hk.i have know the basic concept of balance equation.but some too complex equation i cant balance.is there any general short cut for balancing any simple or complex chemical equation?
*Thursday, January 19, 2012 at 10:50am by kate*

**math**

Thank you so much for the equation - can u explain why we minus the 8 by x. I know it's the amount of time, can u clarify... thanks again
*Thursday, October 18, 2007 at 9:42pm by Cecilia*

**chemistry**

Start with the end equation. FeO(s) + CO(g) ==> Fe(s) + CO2(g) I want an Fe(s) on the right and CO2(g) on the right. The first equation has that so write that one as is (at least for the time being). I would reverse equations 2 and 3 and multiply equation 1 by 3, equation 2...
*Wednesday, March 26, 2008 at 10:08pm by DrBob222*

**Algabra!!!**

ok i asked 4 help earlear ang got it but now im stuck again (2,5) M=1/2 the book says to "write an equation of the line that passws through the point and has the given slope. write the equation in slope-intercept form." but how do i do this with a fraction the book dose not ...
*Thursday, December 6, 2007 at 7:38pm by Mike*

**Chemistry**

Take 1/2 equation 1, add to 1/2 equation 3, add to equation 2 to get the equation you want. K for that reaction is (sqrt k1) x (sqrt k3) x k2
*Sunday, March 31, 2013 at 10:54am by DrBob222*

**Geometry**

You will have to find the equation of both diagonals I will do AC , using the points (3,3) and (-1,1) slope of AC = (3-1)/(3+1) = 2/4 = 1/2 then again using (3,3) y-3 = (1/2)(x-3) 2y - 6 = x-3 x - 2y = -3 Now you find the equation for BD then solve the two equations.
*Wednesday, January 30, 2013 at 7:51pm by Reiny*

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