Recent content by Sirus

Those configurations occur when the 3d orbital is almost half-filled or full, meaning 3d4 or 3d9. Because of the extra stability associated with a half-filled or full 3d orbital, an electron from the 4s orbital jumps into the 3d to achieve that state.

Let me try: (\mbox{heat lost})=-(\mbox{heat gained}) (mc\Delta t)_{1}=-(mc\Delta t)_{2} (4\mbox{kg})(4.19\mbox{kJ/kg}\cdot^{\circ}\mbox{C})({t_{f}-90^{\circ}°\mbox{C})=-(16\mbox{kg})(4.19\mbox{kJ/(kg}\cdot^{\circ}\mbox{C})({t_{f}-10^{\circ}\mbox{C}) Solving for t_{f} gives 26°C.

L'Hospital's rule will work. EDIT: cepheid beat me to it. : )

And how does this help the OP in understanding the problem? BlasterV, why don't you try the problem using what marlon has posted.

Have you attempted the problem? Keep in mind the general formula q=mc\Delta t where q is heat flow in joules (or kilojoules), m is mass in grams (or kilograms, if q was in kilojoules), c is the specific heat capacity in the appropriate units, and t the temperature in °C.

A more fruitful search may be the one in PF. This exact topic has been discussed in depth extensively on the forum. Search around for additional information if you like, and post any follow-up questions you may have.

Please do not double post. I have responded in the homework forum.

You need to show us some work first. You will information about solution A before you can find any about solution C, so leave that last one out for now. Since A is a weak acid, you need to find its Ka before you can find its pH. How can you do this using information about solution B? Keep the...

http://www.kineticbooks.com/physics/16618/27251/sp.html 's a link for phase constant. Use energy concepts to solve this problem. Remember that mechanical energy is conserved, so the sum of the kinetic and elastic potential energies of the mass is constant throughout its movement. Energy...

c_{1}v_{1}=c_{2}v_{2} where c is concentration and v is volume. Find the initial [OH-], then use the above formula and the information given to find the new concentration.

Perhaps you guys should have waited for the OP's response rather than doing the problem for him/her.

Well, someone here would have to do the whole problem to see if that's right. Why don't you show us your work, and we'll go from there.

You mean the math typesetting? That's Latex. This should get you started.

Smells like homework... Show us an attempt at solving the problem. Start with the equations you know for kinetic energy and momentum as functions of velocity, and relate them through that variable.

Amusing. Coincidentially, this last week was the worst in terms of cramming/procastination of my entire educational career. Last Thursday night, I had slept 2 hours in the last 40 before going to bed. I slept two hours Monday night, one hour Tuesday night, and no more than about three each...