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What is the half-life of bismuth-210 if 9.41 days are required for the mass of a sample of bismuth-210 to fall to 27.2 percent of its original value? Since the decomposition is a radioactive decay reaction, it is first order.
sappose that 25.0 ml of 0.50 m k2cro4aqreacts with 15.0 ml of agno3aq completly.what mass ofnacl is needed to react
A flask of unknown volume was filled with air to a pressure of 3.23 atm. This flask was then attached to an evacuated flask with a known volume of 8.00 L, and the air was allowed to expand into the flask.
Find delta s, q,w, and delta u for the reversible isothermal expansion of 3.000mol of argon (assumed ideal) from a volume of 100.0L to a volume of 500.0L at 298.15K
Calculate the free energy change for the combustion of methane at 250oC. Assume that all reactants and products are gases and that the pressures of the various gases of interest are: methane = 0.56 atm, oxygen = 0.45 atm, carbon dioxide = 2.10 atm..
What is the concentration of bromide, in ppm, if 48.38 g MgBr2 is dissolved in 2.22 L water.
when 16.8 j was added as heat to a particular ideal gas the volume of the gas changed from 42 cm3 to 87 cm3 while the
The value of delta H for the decomposition of gaseous sulfur trioxide to its component elements, 2SO3 (g) ---> 2S (s, rhombic) + 3O2 (g) is _____ kj/mol.
When 1.00 g of Boron is burned in O2 (g) to form B2O3 (s), enough heat is generated to raise the temp of 733 g of water from 18.0 deg C to 38.0 deg C. Calculate the hear of formation of B2O3(s) under these condtions.
Problem- Calculate the potential for the oxidation of a carbohydrate (CH2O) by sulfate (SO4(2-)). Compare this to the potential if O2 is used as the oxidant.
Calculate pCu2+ at each of the following points in the titration of 50.0 mL of 0.001 M Cu 2+ with 0.001 M EDTA at pH 11.00 in a solution whose NH3 concentration is somehow fixed at 0.100 M: a) 45.0 mL b) 50.0 mL c) 55.0 mL
what mass of sucrose should be combined with 462 of water to make a solution with an osmotic pressure of 8.30 at 270 ?
Calculate the change in internal energy, (Delta E) for the reaction. What is the enthalpy of formation per mole of product for the reaction
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