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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?
What observed rotation is expected when a 1.10 M solution of (R)-2-butanol is mixed with an equal volume of a 0.550 M solution of racemic 2-butanol,
Assuming the waste heat of the engine provides all the heat necessary to melt the iceberg, how much work can this do?
What is the pKb for the acetylsalicylate (C9H7O4-) ion in a 0.10 M solution of sodium acetylsalicylate (NaC9H7O4). A. 3.52 B. 10.48 C. 3.0 x 10-4 D. 3.0 x 10-11 E. 8.26
To what pH should a solution that is 0.075 M each in Ca2+ and Cd2+ ions be adjusted in order to best separate ions by precipitation of one of the hydroxides. What are the concentrations of the metal ions after the pH is adjusted to this value
The products of the fastest inactivation process are as explain the mechanism is accountable for the making of the products.
After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37 C. Calculate the heat capacity of the calorimeter (J/C - joules per degree).
Why does a protic solvent favor E1 over E2? I know with Sn2 a protic solvent would surround the Nu: and hinder it from attacking, but in E2 there is not a nucleophilic attack.
Non-Bridging Calcium-Oxide Ions, What weight percent of CaO should a glass be for 20% of the oxygen ions to be non-bridging, if the glass contains only SiO2 and CaO?
analysis of a sample of a covalent compound showed that it contained 14.4 hydrogen and 85.6 carbon by mass. what is the
what is vapor pressure in mmhg of a solution prepared by dissolving 5.00 g of benzoic acid in 100g of ethyl alcohol at 35 degrees celcius? the vapor pressure of pure ethyl alcohol at 35 degrees if 100.5 mmHg
Concentrated hydrochloric acid is 12 M and has a density of 1.18 g/mL. Calculate the mass in grams of a 0.025 L sample of concentrated hydrochloric acid.
How much water would you add to 50.0mL of 0.400M NaOH if you wanted the final concentration to be 0.200M ?
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