Recent content by elitespart

right, I did that. but I'm not sure if the NH3s are fixed or if they can move around etc. I have: NH3 l NH3 - Co - NH3 l NH3 And one F coming out of the screen and...

How can you know if a complex ion has an optical isomer or not? I understand that it's when the mirror image can't be superimposed but am having trouble recognizing it. For example, take [Co(NH3)4F2]+. Does this have an optical isomer or just cis/trans?

=cos10. Thank you very much. Much appreciated.

oh okay. so it's T*Lsin80 since force has to be perpendicular to the lever arm.

It would be 80 yes?

That's what they had in the solution. From the pic I'm getting an angle of 30 between the wire and beam.

Well I'm guessing it's cos(10) but I don't know where that is coming from.

no that's not right. the answer is 2251N. Using your torque for the wire gives an answer of 6898.

Sorry I'm not quite sure what you mean. In the solution it divided the sum of the torques from the crate and the beam by cos(10). Where did they get that from?

A 1200 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1960 N crate hangs from the far end of the beam. Picture: http://edugen.wiley.com/edugen/courses/crs1507/art/qb/qu/c09/ch09p_20.gif Calculate the magnitude of the tension in the...

But you'd need to get delta S first right? EDIT: nvm, got it.

Is it possible to calculate Ksp at a certain temperature if you know Ksp at a different temperature and \Delta H?

Okay so I'm confused. In my book it says that ksp for Ca(OH)2 = 6.5E-6 and \Delta G=-898.5 yet when I use the equation \Delta G=-RTln(Ksp) the value I get is 29.59KJ/mol. I used R=8.314 and T=298K. What's up with that? Thanks.

What is the color of solid silver phosphate? I don't have a reference book handy with me. Thanks.

http://imageshack.us" http://g.imageshack.us/img10/scan0001px3.jpg/1/" http://g.imageshack.us/img27/scan0001xe4.jpg/1/" Well I just set the sum of x and y components equal to 0 and got: force 3 = -65N in x and 43.3N in y which gave me a magnitude of 78.1 N and 146.3 degrees...