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A 7.25g sample of solid sodium hydroxide was dissolved in a calorimeter in 199.4g of water. The temperature of the water rose from 22.1°C to 37.5°C. Calculate the enthalpy per mole of sodium hydroxide for the dissolution process. Assume the specific heat of the solution is the same as that for pure water.
A gas has a pressure of 4.82035 atm when its volume is 2.75 L. What will the pressure be when the volume is changed to 1.91015 L, assuming constant temperature.
If the mass of the ore from which the gold was extracted is 166.0 g, what percentage of the ore is gold.
Calculate the energy of an electron in the hydrogen atom when n = 2 and calculate the energy of an electron in the hydrogen atom when n = 6.
What is the theoretical yield of aluminum oxide if 1.60 mol of aluminum metal is exposed to 1.50 mol of oxygen?
Calculate the concentration of NO3- ion remaining in solution.
How many mL of a .244 M HCL solution will react with .0235 mole of MgO? The reaction of MgO and HCl is given below.
Calculate the molarity of each of the following solutions: (a) 29.0 g of ethanol (C2H5OH) in 545 mL of solution, (b) 15.4 g of sucrose (C12H22O11) in 74.0 mL of solution.
Using the data in your textbook, calculate the concentrations of the molecular and ionic species and the pH in aqueous solution that has a formal composition of 0.0700 M KH2PO4 + 0.5500 M K2HPO4.
When 2, 2-diphenyl-1-ethanol is treated with aqueous HI the main product of the reaction is 1-iiodo-1, 1-diphenylethane. Propose a plausible mechanism that accounts for the formation of this product
Explain how the carbonate system in natural waters provides buffering capacity
A solution is prepared by dissolving 10.5 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 13.00 mL sample of this stock solution is added to 55.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
what is the molar mass of a sample of gas that has a dnesity of 1.09 g/L at 1.02 atm pressure and 25.0C.
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