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Write charge and mass balances for aqueous Ca3(PO4)2if the species are Ca2+, CaOH+, CaPO4-,PO43-, HPO42-, H2PO4-and H3PO4
Imagine that 1.00 mol H2O(l) is placed in a piston with a constant external pressure Pext = 1 bar. The piston is then placed in a large thermal bath at a temperature of 270 K.
Calculate the wavelength of light that would be required to excite an electron from the HOMO to the LUMO. Hint: Recall that (triangle)E=hv=hc/lambda, and that 1 eV=1.602 x 10^-19 Joules.
A heat exchanger is used to transfer heat from a steam stream to a chlorine gas stream. 100 kg of steam at 1 bar and 400°C enters the heat exchanger and leaves the exchanger as saturated steam at 1 bar. Chlorine gas enters the exchanger at 1 bar a..
What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?
Show the terminal alkyne and alkyl halide from which the following products can be obtained. If two routes look freasible, list both
Nitrosyl bromide, NOBr, is 34 percent dissociated at 25 deg. C and the total pressure is 0.25 atm.
What volume of a 0.170 M NH4I solution is required to react with 963 mL of a 0.440 M Pb(NO3)2 solution? How many moles of PbI2 are formed from this reaction?
A 0.868 g sample of an unknown acid requires 32.8 mL of a 0.180 M barium hydroxide solution for neutralization. Assuming the acid is diprotic, calculate the molar mass of the acid
If the molar mass is 88 g/mol and the percent composition is 54.5% carbon, 9.15% hydrogen and 36.3% oxygen, what is the molecular formula of dioxane?
A particular Lake contains 10^10 liter of water. Due to acidification, the pH of the Lake is 5.00. It has been decided to add enough calcium carbonate to the lake to bring the pH to 6.00.
The activation energy of the orginal pathway is 106 KJ/mol. What is the activation energy of the new pathway, all other factors being equal?
Calculate the minimum volume of distilled water, in liters, necessary to completely dissolve a 7.5 g sample of AgBr (s) at 298K. The molar mass of AgBr is 188 g mol ?
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