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The analysis of a coal from Pennsylvania is reported as follows (wt. %)
Moisture 3.30
Volatile Matter 20.50
Fixed Carbon 70.00
Ash 6.20
Carbon 80.7
Hydrogen 4.50
Sulfur 1.80
Oxygen 2.40
Nitrogen 1.10
effuse through a membrane. How long would it take the same number of moles of Ar(g) to effuse through the same membrane?
The normal boiling point of carbon disulfide is 46.0 °C and its H°vap = 14.2 kJ mol-1. Draw a complete Lewis structure for carbon disulfide
If a reaction vessel initially contains only co and NH3 at concentrations of 1.00 m and 2.00m , respectively, what will the concentration of HCONH2 be at equilibrium?
what is the molar mass of a gaseous element that Effuses through an opening of a box 1.12 times as fast as argon at the same temperature.
undergo an isothermal compression until the pressure of the system is four times the original pressure. The process may occur in two ways:
A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?
What are the concentrations of H2SO4 and H2SO3 in a 25ml solution titrated with .1M NaOH. The first endpoint is reached after 37.89ml of NaOH are added (pH=7) and the second endpoint is reached after 43.57ml of NaOH are added (pH=9.8).
what is used to measure volumes of liquid accurately? what is used to hold a stem funnel in filtration or a crucible and cover?
A galvanic cell Zn / Zn2+ // Cu2+ / Cu generates a current of 4.00 Amperes for 1.00 hour. The cathode increases in mass by 10.0g . If charge on an electron is 1.602 x 10-19 coulombs/ electron.
The concentration of hydroxylamine in a solution is 0.025M. What is the concentration of hydroxide ion in the solution
Using the following spectral information, determine the name of unknown organic compound A. For full credit, explain why/how the spectral information led you to your answer.
Given a solution of .1 M HEPES in its fully protonated form, and ready access to .1M HCl, .1M NaOH, and distilled water. Describe the preparation of 1L of .025 M HEPES buffer solution, pH 7.8?
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