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A .464 g sample of a metal, M, reacts completely with sulfuric acid according to M+H2SO4 yields MSO4+H2. A Volume of 211 mL of H is collected over water, the water level in the collecting vessel is the same as the outside level. Atm Pressure is 756 Torr and the temp is 25 degree C. Calculate atomic mass of the metal.
The density of a gaseous element at 310oC and 1.02 atm is 2.64 g/L. What is the molecular weight of the element
Averge frequency of light emitted a 100 w lightbulb is 5.5x10^14 Hz. How many photons per second does the light bulb emit?
Calculate the percent water: mass of water lost / mass of hydrated salt x 100%. E. Write the empirical formula for hydrated alum, based on your experiment.
What ions will the following elements form? Enter the letter of the item in Column Two that best matches the item in Column One.
The original concentration of Glucose-6-phosphate is 0.25 M, but when the system reaches equilibrium, only 2.5% of the original glucose-6-phosphate remains. calculate the Keq.
The solubility of ammonium chloride at 70. C is 60. g of solute per 100. g of water. Which solution would be saturated at 70. C
addition of excess NH3 to this acidic solution produces only a blue solution. Which group III ions are present, which are absent and which are in doubt? How would you remove all doubt?
Calculate the partial pressure of each, the total pressure and the composition of the liquid solution.
suppose that 2.00L of solution are made from 150. mg of citric acid, C6H8O7, A. what is the molar mass of citric acid? B. what is the molarity of citric acid in the solution?
110 micro mol of 206^Pb. Assuming that all the 206^Pb comes from decay of the 238^U, estimate the rocks age (in yr).
Lithium hydrogen carbonate decomposes by heat; the reaction is represented by the balanced equation: 2LiHCO3 (s) --------> Li2CO3(s) + CO2(g) + H20 (g)
Calculate the nuclear binding energy per mole of nuclei of and the binding energy per mole of nucleons for 31P. The required masses (g/mol) are: 1 1H = 1.00783; 1 0n = 1.00867; 31 15P = 30.97376
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