kakoka

a 1.924 L solution is made by dissolving 6.432g of Li3PO4 into water. Calculate the concentrations of the ions present when the Li3PO4 solution is added to 1.598 L of an Ag3PO4 solution. So, I can calculate the concentrations of each ion in the separate solutions and in the combined solution, but then I think that if something precipitates, the concentrations would change. According to my calculations, the calculated Ksp of Ag3PO4 exceeds the real Ksp of saturation for the solution. This would mean a precipitate of Ag3PO4. From there, I am lost. I don't know how to calculate how much precipitates and whether I should subtract the precipitated solid from the concentrations I calculated. Please help!

A calorie is the amount of energy needed to raise 1g of water 1 degree, so does that mean that colder foods would take more energy to digest as they have to be raised to body temperature from say frozen or something? I know that a food calorie is really 1,000 calories, so the difference wouldn't be too great, but is there a difference at all? What about eating food that is very hot, would that result in more caloric intake?

thanks, very helpful. but im still curious; is air denser at lower elevations? does gravity effect the movement of air particles, like a downward sloping movement or something? are sound waves affected by gravity, like sloping along the curve of the earth or something?

So im on the right track with gravity causing air pressure? I don't know what exactly you mean by "mixing in the same area." So does having less atmosphere above higher altitude locations have no effect on the air pressure?

I am wondering about the causes of atmospheric pressure. All the sights I have found say that air pressure is caused by the weight of air above a point pressing down upon air below it. This seems to contradict Dalton's law of partial pressure because air cannot press on other air and have an effect. Am I missing something? I was thinking that maybe gravity is more of the reason for the pressure, being that gravity is stronger closer to the core, so the weaker effect of gravity at higher altitudes could cause changes in air density or something. Could somebody help me understand this, please?