Number of results: 23,316
Suppose a student started with 133 mg of trans-cinnamic acid and 0.50 mL of a 10% (v/v) bromime solution, and after the reaction and workup, ended up with 0.236 g of brominated product. Calculate the student's theoretical and percent yields.
Wednesday, January 23, 2013 at 4:30am by Anonymous
I need help to finish responding this question and also if someone will tell me if i'm going the right way. the question is:Consider racialimbalances in education,the economy,family life,housing,criminal justice,health care,and politics.Of these societal challenges facing ...
Tuesday, October 24, 2006 at 8:05pm by marie0720
What is the way to find the answer to the problem....3x+1=10? My teacher told us in class but I just didn't understad it. The idea is to get the x all alone on one side. Subtract one from each side. Then, divide each side by three. 3x + 1 = 10 First subtract 1 from both sides...
Tuesday, October 24, 2006 at 9:14pm by Jorden
Help to solve this 1/2 (3g-2) = g/6 nevermind I was missing a bracket in the solution. multiply both sides by 2 This gives 3g-2=g/3 now cross multiply to get 9g-6=g now add a -g to both sides and +6 to both sides. g=3/4
Tuesday, October 24, 2006 at 10:40pm by Confused
Explain (in 3 or more sentences) how you can tell if a system of two linear equations has 0, 1, or infinitely many solutions. Be sure to say how the lines are not related and give specific examples of each. ok, I think it might be: A system of two linear equations has one ...
Wednesday, October 25, 2006 at 1:11am by anonymous
AP Bio potato/osmosis lab
If a potato core is allowed to dehydrate by sitting in open air, would the water potential of the potato cells decrease or increase? i think it decreases but i'm not sure. and if a plant cell has a lower water potential than its surroundings and if pressure=0, is the cell ...
Wednesday, October 25, 2006 at 5:52pm by lisa
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure (in torr) of a solution made from dissolving 16.6 g of biphenyl in 26.0 g of benzene?
Wednesday, January 23, 2013 at 2:31am by Ocean
secant line, tangent line
f(x) = sqrt(x-1), 1<=x<=3 Let A = (a,f(a)), and B = (b,f(b)). Write an equation for 1. the secant line AB 2. a tangent line to f in the interval (a,b) that is parallel to AB Thank you for all the help. For the line, you have two points, y=mx+b put the two points in, and ...
Saturday, October 28, 2006 at 10:59pm by Jen
And you ought to do some research on mordants. In this case try the experiment on each dye with and without a tablespoon of vinegar in the solution. maybe if you test water it would probably be the same, good question AND, you may wish to try more than one color as different ...
Sunday, October 29, 2006 at 9:36pm by bobpursley
a. How many moles of Na2Co3 were present in the 15mL sample? b. How many grams of Na2CO3 were present in the 15mL sample? c.How many grams of Na2CO3 are present in the 575L of the Na2CO3 solution?
Sunday, October 28, 2007 at 5:13pm by Monte;
You made 100.0 ml of a lead (II) nitrate solution for lab but forgot to cap it. The next lab session you noticed that there was only 80.0 ml left. In addition, you forgot the initial concentration of the solution. You decide to take 2.00 ml of the solution and add an excess of...
Monday, October 30, 2006 at 8:04pm by Anonymous
This is the problem: In a 1-L beaker, 203 ml of 0.307 M ammonium chromate was mixed with 137 ml of 0.269 M chromium (III) nitrite to produce ammonium nitrite and chromium (III) chromate. Write the balanced chemical reaction occuring here. If the percent yield of the reaction ...
Monday, October 30, 2006 at 8:05pm by Anonymous
(4-y^2)/(y-2) = y/2 (4-y^2)/(y-2) = y/2 4 - y^2 = (y*(y-2))/2 4 - y^2 = (y^2-2y)/2 8 - 2y^2 = y^2 - 2y 3y^2 - 2y - 8 = 0 (keep the above equation in mind) quadratic formula: (-b +/- sqrt(b^2 - 4ac))/2a now solve by plugging in the appropriate numbers and choose (normally) the ...
Monday, October 30, 2006 at 8:28pm by math
are both of these a compound or simple sentences I need to have these as a model for the other one's. 1. Her mother went to trade show, but doreen stayed home. 2. Wang and his brother looked at the problem and spotted the solution. i think: 1. compound because "Her Mother went...
Monday, October 30, 2006 at 11:35pm by liz
How do precipitates combine in a solution? Very slowly, if at all. Chemical reactions require that atoms/ions contact each other individually.
Tuesday, October 31, 2006 at 6:52pm by Morgan
When 3g of sodium hydroxide (NaOH) was dissolved in 150g of water a value of 10.5 degrees C was obtained for delta T. Calculate the heat (calories) produced by the solution of 3 g of NaOH Calculate the number of calories that would be produced if one mole of sodium hydroxide ...
Thursday, November 2, 2006 at 6:25am by Talina
25.0 cm cubed of Barium hydroxide,Ba(OH)2 solution neautralises 35.0 cm cubed of aqueous hydrochloric acid of concentration 0.09 mol dm-3. what is the concentration of the barium hydroxide? I like the titration equation Normalitybase*volumebase*concentrationBase equals ...
Sunday, November 5, 2006 at 8:23am by Laura
Substitution Method in Algebra!HELP PLZ!
Use the Substitution method to solve the system of equations. 3x + y = 5 4x - 7y = -10 multiply first equation by 4 multiply second equation by 3 thus both equations have same x or y value in this case it is the x value. 12x + 4y = 20 12x - 21y = -30 solve by elimination then ...
Sunday, November 5, 2006 at 5:54pm by Matthew
Algebra!Problem Solving!PLZ HELP!
Sunset rents an SUV at $21.95 plus $0.23 per mile. Sunrise rents the same vehicle for $24.95 plus $0.19 per mile. For what mileage is the cost the same? This means that one cost equals the other. Let X stand for the number of miles. Thus the basic cost plus the mileage costs ...
Sunday, November 5, 2006 at 6:05pm by Matthew
When I solve the inquality 2x^2 - 6 < 0, I get x < + or - sqrt(3) So how do I write the solution? Is it (+sqrt(3),-sqrt(3)) or (-infinity, sqrt(3))? Why? Thanks. So would this work? abs x < ( sqrt 3 ) or - sqrt 3<x<sqrt 3 The answer is given (+sqrt(3),-sqrt(3)) ...
Sunday, November 5, 2006 at 8:44pm by Jen