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What is the total molar concentration of all the ions in 0.020 M solutions of the following salts in water? 0.020 M KCl = ____ M ions 0.020 M CuSO4 = ____ M ions 0.020 M CaCl2 = ____ M ions
The major industrial method for the preparation of elemental phosphorus is heating a mixture of phosphate rock, carbon, and sand in an electric furnace. The chemical reactions can be represented by
what volume of 3M H2SO4 is needed to neutralize all of the disodium salicylate and the excess NaOH present after the initial reaction? how much sulfuric acid was in excess
Derive the activation energy for a reaction that proceeds 2 times faster when the temperature is raised from 20 C to 30 C.
What mass of carbon dioxide is produced from the complete combustion of 6.50×10-3 of methane?
What is the density of a sample of air (average molar mass is 28.8 g/mol) that has a pressure of 750torr and a temperature of 27 degrees C?
A total of 0.160 g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 C the osmotic pressure produced by the solution was 0.138atm. What is the molar mass of the protein?
Determine the center temperature of the product afer 60 minutes if the convective heat transfer coefficient between the product and mbient air is 25 W/m^2 K.
Are the physical and chemical properties of a compound necessarily similar to those of the elements of which it is composed
The phosphate ion forms insoluble precipitates with calcium and magnesium ions, removing them from solution. Suppose that a solution is 4.5×10?2 in calcium chloride and 8.5×10?2 in magnesium nitrate.
If the volumes of reagents indicated were combined and 219 seconds elapse before the color appears, calculate the rate of reaction in M/s.
What is the molar mass of mixture A and mixture B? Show detailed work for first and best rating.
As space exploration increases, means of communication between humans and other planets are being developed
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