Recent content by chem_is_lovex

hey guys, thanks for answering! I managed to do it myself though, and I did it the way you guys said :)

This was a question from one of my tutes earlier in the semester, and now that I'm revising for an exam I can't seem to remember how to do it. If anyone can help that would be great! Sulfuric acid is a major bulk chemical used in a wide variety of industries. After sulfur is oxidized to...

ok :) thanks! it was a lot simpler than I imagined it to be...

ok, I did that and I got the ratio to be 3.55. I then tried to find the conc. of H+, therefore the conc. of carbonate ions... is this how you're supposed to do it? it also says "you should specify the amounts of sodium carbonate and sodium hydrogen carbonate that you would use" thanks

Homework Statement "Plan how to make 100mL of a buffer solution with a pH of 10.8 to be made using only sodium carbonate, sodium hydrogen carbonate and water" Homework Equations pH= pKa+ log(CO32-)/(HCO3-) The Attempt at a Solution I tried rearranging it, but I'm not sure what to do...

can someone please answer my question too? thanks, I'm nearly finished this question...

ohhhh, yeah. ok, I didn't expand the 2(a2I1) and I get a2I1=5. next I did some working (attached) and I found that a2=5a1. What do I do after? I tried to sub it into some equations, but I can't seem to get a decent answer... is the working out I've done anywhere close to right?

ok, I've attached my working out... as you can tell I'm not very good at simplifying equations, so please bear with me.

ok, I tried that and I got a ratio of a[SIZE="1"]2=(5*a[SIZE="1"]1)/2 now do I sub this back into one of the power equations? and is this ratio even right?

ummm... The I[SIZE="1"]2=a[SIZE="1"]1*I[SIZE="1"]1 and I[SIZE="1"]3=a[SIZE="1"]2*I[SIZE="1"]1? and is the power being dissapated: P=(I[SIZE="1"]2^2)*R[SIZE="1"]2 and P=(I[SIZE="1"]3^2)*R[SIZE="1"]3?

Homework Statement The sinusoidal voltage source in the circuit shown in Fig. 2 is developing an RMS voltage of 2000V. The 4ohm load in the circuit is absorbing 4 times as much average power as the 25ohm load. The two loads are matched to the sinusoidal source that has an internal impedance of...

Homework Statement when a charged particle enters a magnetic field in a cloud chamber, why does it move in a circular path instead of straight line? I have no idea why. please help Homework Equations The Attempt at a Solution it has something to do with the r changing? as I said...

ok. thanks :)

hi, stonebridge. sorry to bother you, but I was wondering whether the resonator for a trumpet is the air inside? or the tubes? thanks

Homework Statement what is the resonator of the trumpet? A resonator is the part that vibrates at the resonant frequency. Homework Equations --- The Attempt at a Solution my friend said it was the air inside the tube, but I thought it was the tubes. thanks