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How many grams of sodium bicarbonate and sodium carbonate, respectively, are needed to make 3 liters of 0.075 M buffer, pH 10.500?
A compound is found to be 74.03% C, 8.70% H, and 17.27% N. The molar mass of the compound is 162.23 g/mol. Find the empirical formula and the molecular formula of the compound?
Calculate the molar amounts of NaOH used in the reaction with the HCI solution and with the HC2H3O2 solution?
The two occuring isotopes of gallium-69 and gallium-71,which are found in the ratio of 3:2. Determine the atomic mass of gallium.
A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How many grams of NaCl are contained in 729 mL of this solution.
Determine the boiling point of a solution of 22.5 g of fructose, C6H12O6 , in 294 g of phenol.
Talc is a mineral that has low conductivity for heat and electricity and that is not attacked by acid. It is used as talcum powder and face powder. A sample of talc weighs 35.97 g in air and 13.65 g in mineral oil (d = 1.75 g/cm3). What is the den..
The half life of Iodine-131 is 8.0252 days. If 14.2 grams of I-131 is released in Japan and takes 31.8 days to travel across the Pacific
Explain why the rates of diffusion of nitrogen gas and carbon monoxide are almost identical at the same temperature.
What is the order of the reaction if it takes 10 minutes, 20 minutes, 30 minutes to reach 75% conversion?
calculate the molarity of a KCl solution made by disslving 52.5 g of KCl in 250 ml of water?
A 4.50-g sample of LiCl at 25 C dissolves in 25.0 mL of water also at 25 C. The final equilibrium temperature of the resulting solution is 60.8 C. What is the enthalpy, change of enthalpy, of LiCL expressed in kj per mole?
prepare a schematic diagram of the work up procedure, including the column chromatography with acetylferrocene, diacetylferrocene, ferrocene
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