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Suppose that an 80.0 laboratory animal ingested 12.0 of a substance that contained 2.45% by mass , an alpha emitter with a half-life of 24,110 years.
What is the animal's initial radiation exposure in Curies? If all of the energy from the emitted alpha particles is absorbed by the animal's tissues, and if the energy of each emission is what is the dose in rads to the animal in the first 4.5 hours following the ingestion of the radioactive material?
For the following electrochemical cell Cu(s)|Cu2 (aq, 0.0155 M)||Ag (aq, 1.50 M)|Ag(s) write the net cell equation. phases are optional. do not include the concentrations
If the specific heat of the solution is 4.18 J/g(g*degreesC), calculate delta H for the reaction, as written. Ba(s) + 2H2O(l) = Ba(OH)2 (aq) + H2 (g) Delta H=?
4.00 mL if 0.100M t-BuCl are mixed with 4.00mL of 0.0100 M NaOH and 2.00 mL of Distilled water. Calculate the initial Molarity of t-BuCl. How many moles of t-BuCl will have reacted when bromophenol blue changes colors
How much heat is required to warm 223 g of ice from -46.3°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
How many mL of H2 (g) measured at STP are produced at a platinum cathode in the electrolysis of H2SO4 (aq) by 4.35 A of electric current in 6.00 min? a. 112 b. 16.3 c. 364 d. 182 e. 91.0
In a .050 M HCl solution an indicator is not all in acid form. For methyl orange, what percentage of the indicator is in each form
The calorimeter contains exactly 281 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y--X(with 2 lone pairs)--Y can be abbreviated as XY2Z2
We did a lab on equilibrium and le chatelier's principle. On one portion, there was a copper complex, and we had to add different components to a solution and write down the changes that took place
A refrigeration system contains 575 ml of a gas at 22 degrees C and 1.25 atm. The gas is compressed until it has a pressure of 2.00 atm and a temperature of -6 degrees C. What is the new volume of the gas in the system
How many grams of propane must be burned to provide the heat needed to melt a 75.0-g piece of bromine (at its melting point) and bring the resulting liquid to a boil (with no vapourization)? Assume a constant pressure of 1 bar and use the followin..
it the pH of a strong acid solution nearer to O and a strong base to 14 while a weak adis and base are closer to there perspective approach to 7?
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