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At what temperature is the reduction of tungsten(VI) oxide by hydrogen to give metallic tungsten and steam spontaneous? The standard heat of formation of WO3(s) is -843 kJ/mol, and its standard molar entropy is 76 J(K mol).
Calculate the pH for the titration of 20mL of .75M formic acid (HCOOH) Ka(HCOOH) = 1.8e-4, with .2M KOH. a) Before any acid is added
Which side left or right does the equilibrium lay for the subsequent reaction as well as explain the reason- CH3COOH (pKa =4.8) + NH3 Û CH3COO-_ + NH4+
suppose you have a solution that might contain any or all of the following cations: Cu2+, Ag+, Ba2+, and Mn2+. the addition of HBr causes a precipitate to form
flask a 25 ml 8 oh- ions and 4 ca 2 ionsflask b 25 ml 6 h ions and 6 cl- ionsa if each sphere represents 1.0 x 10-3 mol
molar mass of anbsp solvent is 68.2 gmol and a normal freezing point 31.9 oc. the freezing point depression constant k
When looking at a d8 tanabe-sugano diagram how can you determine the total number of peaks that will be seen in the UV-Vis spectrum of the compound
Uranium hexaflouride is a solid at room temperature but boils at 56 C. Determine the density of uranium hexaflouride at 60 C and 745 torr.
Calculate the molar mass of a gas that has a density of 0.232 g/L at 156 oC and 222 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
A current of 3.65 A is passed through a Fe(NO3)2 solution for 1.40 hours. How much iron is plated out of the solution
Cortisol ( M=362.47g/mol); Corisol is 69.6% C, 8.34% H, 22.1% O by mass. What are the empirical and molecular formula?
Calculate (a). the kilograms of water per minute needed to remove the sulfur dioxide assuming that the exit water is in equilibrium with the entering gas and (b) the ratio of the water stream to the gas stream. The Henry's law constant for sulfur ..
Caffeine crystals always contain at least one molecule of water per caffeine molecule. Draw chemical structures to explain why a water molecule might be essential to producing a stable crystal of caffeine.
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