Number of results: 99,212
Ignore my previous answer. I was using the transmittance equation instead of absorbance. I should have known better. Absorbance = 1 - e^-kX If absorbance = 0.50, kX = 0.6931 If absorbance = 0.31, e^-kX = 0.69 and kX = 0.3711 X is the path length which stays the same, so k ...
Friday, February 22, 2008 at 11:53am by drwls
I have been informed by DrBob222 that the structure of ethanol is actually CH3CH2OH, rather than what I wrote. Nevertheless, it is true that an asymmetrical structure is the source of the diple moment. Chemistry is not my field of expertise; I apologize for the error
Saturday, March 8, 2008 at 6:35am by drwls
Ignore my answer and go with DrBob's I did not notice that Co should have been CO
Wednesday, April 9, 2008 at 4:01pm by drwls
I quoted radius above that obtained 2.86 x 10^-8 but that isn't what I found. I found radius of the iron atom to be 1.24 x 10^-8 cm.
Saturday, November 14, 2009 at 11:50am by DrBob222
That produces the R-C=O with the O-R' hooked to the C.
Wednesday, January 13, 2010 at 8:58pm by DrBob222
pi* = MRT slight typo here. M and not n. M = molarity = moles/L. You have L and M, calculate moles. Then moles = grams/molar mass. Sorry 'bout that.
Thursday, January 28, 2010 at 8:50pm by DrBob222
I made a typo. The equation should be V1/T1 = V2/T2
Sunday, February 28, 2010 at 4:57pm by DrBob222
I CAN'T hazard......
Sunday, February 28, 2010 at 3:01pm by DrBob222
Correction to response by Zoe 2NaOH + H2SO4 ---> Na2SO4 + 2H2O n = (Molarity)(vol) n= (0.10M)(0.04L) =0.004moles of H2SO4 0.004molesH2SO4 * 2moles NaOH/1mole H2SO4 = 0.008moles NaOH so M= n/v v=n/M = 0.008/0.50 OK to here. 0.008 moles/0.50 L = 0.016 L or 16 mL. = 0.004L 0....
Saturday, March 6, 2010 at 4:43pm by DrBob222
Correction to post by Jothey. 2.48 x 10^-3 atm x (760 torr/1 atm) = +1.88 torr.
Saturday, March 6, 2010 at 9:18pm by DrBob222
I made a typo, next to last line, should be molar mass K2C2O4 = g K2C2O4 instead of what follows. molar mass K2C2O4 = g K2C3O4. Check my thinking. Check my work.
Wednesday, March 10, 2010 at 10:26pm by DrBob222
1. Which two elements react vigorously with each other? A: Chlorine and lithium B:Chlorine and potassium C:iodine and lithium D:iodine and potassium my answer is B 2. which statement about electronegativty is correct. A: Electronegativity decrease across a period. B:...
Thursday, March 11, 2010 at 1:16pm by Richard
1. Which two elements react vigorously with each other? A: Chlorine and lithium B:Chlorine and potassium C:iodine and lithium D:iodine and potassium my answer is B B is correct; I think A is true, also. 2. which statement about electronegativty is correct. A: Electronegativity...
Thursday, March 11, 2010 at 1:16pm by DrBob222
Need to correct response by Anon. Penta means 5 tetra means 4 nitrogen pentasulfide would be, following the name, NS5. I haen't heard of this compound. I would expect a N/S compound to be N2S5 (simiilar to P2S5 in the next compound); however, I assume that name would be ...
Thursday, March 11, 2010 at 2:18pm by DrBob222
I need to make a correction. The BaSO4 shown in the middle question is a solid) and should be written as BaSO4(s)
Tuesday, March 16, 2010 at 8:44pm by DrBob222
Obviously, the unit is liters and not grams.. 0.62492 mol x 22.4 L/mol = 13.9982 L = 14.0 L Cl2 un-reacted.
Sunday, June 6, 2010 at 11:33am by DrBob222
I made a typo in this part. The corrected part is in bold. You should subtract the large number from the small number; i.e., 89.98-64.376 = 25.604. As it is, the way you subtracted the value is -25.604. Another question: I wonder why you DIDN'T WEIGH the container with water ...
Tuesday, June 29, 2010 at 11:15am by DrBob222
I didn't balance the equation. Place a coefficient of 2 for H^+ on the left.
Wednesday, October 13, 2010 at 5:19pm by DrBob222
The number you have from 222,000/6.022E23 (that's not -23 and I've made it Joules by converting kJ to J) is called the work function. For part a, E = h*frequency-work function. I forgot the work function part.
Wednesday, November 17, 2010 at 5:35pm by DrBob222
You move the decimal point to the RIGHT as you go DOWN the table.
Monday, February 7, 2011 at 8:01pm by DrBob222