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Part A- Phosphorus-32 decays by beta emission to form sulfur-32. Explain how many half-lives have passed in the reaction shown here?
Part B- The half-life of phosphorus-32 is 14.26 days compute its decay constant.
Part C- If you by mistake spill phosphorus-32 onto your shoe explain how long would it take before 99.9% of the radioactive material has decayed thus that you can safely wear the shoes again?
a sample of gas in a cylinder as in the example in part a has an initial volume of 40.0 l and you have determined that
How many grams of ammonium chloride (pKa=9.24, 58.491 g/mol) should be added to 500 mL of 0.1060 M ammonia to make a buffer with pH=8.5 (to three s.f.)
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Explain what volume (mL) of a 7.55M Na2CO3 solution would be necessary to prepare 336.00mL of a 9.60%w/v Na2CO3 solution
The indicator changes color signaling that the equivalence point has been reached after 14.0 mL of the hydrochloric acid solution has been added. What is the molar mass of the metal hydroxide
sodium methoxide ch3ona is a weaker base than buli or nbuli butyllithium. recommend an explanation why it is not
The temperature is 2200 oC inside the lightning bolt, the bolt lasts long enough for all three species to reach equilibrium at that temperature, and the pressure of NO is 0.001 atm at equilibrium. Calculate the standard free energy change ΔGo for ..
complete and balance the following equations and identify the oxidizing and reducing agents. recall that o atoms in
Determine how much dolomitic lime(is an anhydrous carbonate mineral composed of calcium magnesium carbonate CaMg(CO 3 ) 2 ) is required to apply to raise the pH to 7.0?
at 25 degrees celsius the concentration of n2 in h2o was determined to be 7.2 x 10-6m. compute the partial pressure of
calculate the delta H for the reaction:CH4(g) + 4Cl2(g) --> CCl4(g) + 4HCl(g). Use the following data: C(s) + 2H2(g) --> CH4(g) delta H = - 74.6 kJ; C(s) + 2Cl2(g) --> CCl4(g) delta H = - 95.7 kJ; H2(g) + Cl2(g) --> 2HCl (g) delta H = - 92.3 kJ
you take 3.1789 g of a substance and place it into 100.0 g of benzene. the boiling point of this solution is found to
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