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Consider the decay series A¡B¡C¡D where A, B, and C are radioactive isotopes with halflives of 4.50 s, 15.0 days, and 1.00 s, respectively, and D is nonradioactive. Starting with 1.00 mole of A, and none of B, C, or D, calculate the number of moles of A, B, C, and D left after 30 days.
Determine how many grams of each of the following solutes would be needed to make 3.00 x 10^2of a 0.100 M solution.
Calibration of a glass electrode gave a reading of 148.7 mV with 0.05 m potassium dihydrogen citrate buffer standard (pH = 3.766) and a reading of -167.4 mV with 0.01 m borax buffer standard (pH = 9.139), both measured at 30°C.
When power was turned off to a 30.0 gal. water heater, the temperature of the water dropped from 75.0°C to 22.5°C. How much heat was lost to the surroundings? (1 gal = 3.785 L) Assume the density of water is 1.00 g/mL.
A 12.0g sample of a gas has a volume of 5.25L at 29 degrees celcius and 764mmhg . If 2.7g of the same gas is added to this constant 5.25L volume and the temperature raised to 67 degrees celcius.
Lethality of Carbon Monoxide, Sulfur Dioxide and TNT, Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning
a compound is found to have a molar mass of 598 gmol. if 35.8 mg of the compound is dissolved in enough water to make
suppose 5.0 mol of antimony iiifluoride is added to 10.0 mil of carbon tetrachloride. how many grams ccl2f2 and sbcl3
What is the internal energy change for the system if 969 joules of heat flows into the system from the surroundings and 253 joules of work is done by the system on the surroundings
An unkown metal crytallizes in one of the three cubic lattices.The edge length of the unit cell is 408pm.Given that the atomic radius of the metal is 144pm and the density of the solid is 19.3g/cm-3, what is the atomic symbol of the metal? a=2R a=..
Explain how a competitive inhibitor inhibits an enzyme and how the effect is different from that of an irreversible inhibitor.
Using the Nernst equation calculate the cell voltage for: Fe(s) + Cd2+(aq) ? Fe2+(aq) + Cd(s) when the [Fe2+] = 0.17 M and [Cd2+] = 1.1 M. Potentially useful information: Fe2+ + 2e
A(aq) 2B(aq) Kc-7.97e-6 at 500K If a 3.40 M sample of A is heated to 500 K, what is the concentration of B at equilibrium
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