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Ammonium system What was the color change when the following substances were added to the system.
NH4Cl,HCl, NaOH
Why the solution turned darker when NaOH is added?
If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 M and 2.00 M, respectively, what will the concentration of HCONH2 be at equilibrium?
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa ) to about 60,000 kPa (60,000,000 Pa).
Compute the number of mill moles in 500 mg of each of the following amino acids: alanine (MW=89), leucine (131), tryptophan (204), cysteine (121), and glutamic acid (147).
Why have Personal Navigation Devices become popular and what technologies are required to facilitate the success of PNDs?
A 250-L tank is evacuated and connected to a 50.0-L bulb filled with compressed argon. After they are joined, the pressure in the bulb falls to 2.20 atm.
Nitrogen and Oxygen form an extensive series of oxides of general formual NxOy; at least 7 are known. One of them is a blue solid that comes apart reversibly in the gas phase. It contains 36.84% N and the rest is Oxygen. What is the empirical form..
A tank contains helium gas at 576 mmHg, nitrogen gas at 1.57 atm, and neon at 730 torr. What is the total pressure in atm?
a 0.500 l solution of 7.50 m hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. calcium
A gaseous reaction occurs at a constant pressure of 40.0 atm and releases 68.0 kJ of heat. Before the reaction, the volume of the system was 9.00 L. After the reaction, the volume of the system was 2.00 L.
Find P given that 25 mL of toluene and 25 mL of an aqueous solution containing 0.000330 moles of an organic compound were shaken together and 31 % was extracted into the organic phase.
Problem- Given the relevant standard free energies of formation, in kJ per mole, calculate delta G for the following reaction at 25 C: 2C2H2(g) + 5O2(g) --> 4CO2(g) + 2H2O(l)
Predict the freezing point of a solution of 10.0 g of carbon tetrachloride, CCl4, in 100.0 g of benezene, C6H6. For benezene
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