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Elemental sulphur occurs in the solid state as 8-membered rings arranged in rhombohedral crystal structure (S8) which melts at 388 K. It is not apparent however, that sulphur in the gas phase is present as S8 molecules. In an evacuated and closed vessel, S8 was heated until the pressure reached 46.06 Torr at a temperature of 347.0 °C. The density of the gas phase at that point was found to be 0.1528 g L-1. Assuming the gas phase is ideal and composed only of a sulfur species (Sn), calculate a value for n?
A buffer is prepared by mixing 295 mL of 0.210 M HCl with 584 mL of 0.559 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
when sodium bicarbonate nahco3s is heated sodium carbonate is produced with the evolution of water vapor and carbon
Calculate the [Zn2+] in a solution of ZnC2O4 held at a pH of 3.00. Remember C2O4^2- is a weak base so you must consider other equilibria.
what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 361 K?
Which of these names and formulae do NOT match correctly. 1. N2O4 : dinitrogen tetroxide 2. MgF2 : magnesium fluoride 3. HgCl : mercury (II) chloride 4. SF6 : sulfur hexafluoride 5. Fe(NO3)3 : iron (III) nitrate
For the following gaseous rxn, if the system is heated and compressed, which way will it shift to restore. What would be the expected shift in equilibrium
when separated from a water solutioncuso4 forms a hydrate with 5 water molecules per formula unit. if 45 g of anhydrous
Use the Van Der Waals equation to calculate the pressures of the three real gases. Compare the plots and explain the origins of any differences you find.
We have a solution that is in equilibrium with solid Ag2SO3 (ksp=1.5x10^-14), and buffered at pH=8.00. The sulfite anion (SO3(2-)) is the conjugate base of the bisulfite anion (HSO3-), Calculate the concentrations of all chemical species present i..
Calculate the atomic mass of zinc from the relative peak intensities in the following spectrum. peak intensity for zinc 64 = 100 peak intensity for zinc 66 = 57.4 peak intensity for zinc 68 = 38.6
a weather balloon with a 2-meter diameter at ambient temperature holds 525 grams of helium. what type of electronic
Using structural formula, how would you write the chemical reaction which explains how the product of the acidification reaction reacts with OH-. How would this explain the changes in solubility?
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