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Calculate the activity of Uranium-238 in 100 grams of uranium ore containing 5 weight percent U308. What is the expected activity of Uranium-234 in the ore?
Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. Which of the two reactant is a limiting reactant
calculate the amount of energy present in the following photons and find the region of electromagnetic spectrum for
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 9.80..
Do not delete any of the atoms or bonds in the template with the Erase button, and do not move atoms or groups directly attached to the ring by dragging them.
If you thought you had discovered a new element, how could you get the scientific world to accept your discovery? What roadblocks might you face, working outside the science community? How could you avoid being labeled a "crackpot"?
the decomposition of a compound in carbon tetrachloride has a rate constant of 7.49 x 10-3 m-1 min-1. if we start with
the crucible is handled with oily fingers after its mass measurement but before the 3g sample of the hydrated salt is
Calculate the energy difference (E) for the transition from n = 1 to n = 4 energy levels of hydrogen per 1 mol of H atoms.
What cell potential (V) would be expected under the following conditions?
This process is an example of sublimation. d) This process is an example of freezing. e) This process is an example of condensation.
Radio waves travel at the speed =3.00 108 m/s(speed of light,). if Saturn is 7.9 108 km from Earth then Determine how many minutes does it take for a radio message to reach Earth from Saturn?
How many kilograms of CO2 are produced by the complete combustion of 1.00kg of this natural gas
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