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Problem- A patient is given 0.055mg of technertium-99 m, a radioactive isotope with a half-life of about 6.0 hours. How long does it take for the radioactive isotope to decay to 1.9 x 10^-3 mg?
Any help is greatly appreciated
Human urine has a normal pH of 6.2. If a person eliminates an average of 1226 mL of urine per day, how many H+ ions are eliminated per week
For the given reaction (1) find out the respective products (2) balance the equations (3) specify the spectator as well as net ionic equations
What volume of .01M HCL must be added to 20 ml of .04M phosphate buffer, pH 6.50, to reduce the pH to 5.5. pK of phosphate buffer is 7.20
What mass of zinc in grams is required to produce 3.2L of H2 (g) from the following reaction at 78 degrees celcius and 790mmHg? Please explain
what mass of barium is produced when molten BaCl2 is electrolyzed by a current of 3.30 105 A for 7.00 hours?
How many moles of carbon dioxide are produced for every mole of tdi that is hydrolyzed
Determine its composition, an aspirin tablet was crushed and dissolved in water. It took 12.25 mL of 0.1466 M NaOH to neutralize the solution. Calculate the number of grains of aspirin in the tablet (one grain = 0.0648 g).
Draw the reaction energy diagram for this reaction mechanism. In your diagram, label for each step, Estimate the relative amount of each product that would result. Please show all of your math
Which one of the following salts, when dissolved in water, produces the solution with the lowest pH
Problem- Calculate the probability that a particle will be found between 0.49L and 0.51L in a box of length L when it is in state (a) n = 1, (b) n = 2
hydrogen gas was collected over water in a eudiometer at 26 degrees c when the atmospheric pressure was 726 mm hg. What was the pressure of the hydrogen gas?
1 some bacteria are able to harvest light of 1000 nm wavelength. a what is the energy in kilojoules of a mole of 1000
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