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If a weak acid, HA, is 3% dissociated in a 0.25 M solution, calculate the Ka and pH of the solution.
calculate how many mgs of Ca2+ are present in 12.0mL of blood and Determine the percent yield 5.04 grams of H2
Is it possible for the activation energy of a reaction to be negative? Explain your conclusion and provide a molecular level explanation.
What would you expect the measured decay rate to be 4.00 hours later? The half-life of Ru-97 is 2.79 days.
Determine the collision frequency at room temperature and compare this with the rate constant and teh Arrhenius parameters determined above.
If a 10.00mL sample of unknown concentration of HF is titrated with 28.94mL of 0.1040M NaOH, what is the concentration of HF
How much heat is required to warm 221 g of ice from -46.1°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
Compute the concentrations of all species in a 0.900 M sodium sulfite solution. If it is given that the ionization constants for H2SO3 are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
calculate the freezing and boiling points of each of the following solutions. 0.40 mol ethylene glycol and 0.17mol KBr in 122 g H2O.
The nuclide 241Am decays with a half life of 458 yrs. If the activity of 241Am in the detector is 3*10^4 Bq, calculate the mass of 241Am present.
decomposition of N2O5 to NO2 and O2 at 70 degree celsius is 6.82 x 10^-3 s-1. Suppose we start with 0.300 mol of N2O5(g) in a .500L container. How many minutes will it take for the quantity of N2O5 to drop to .030 moles?
Describe and explain how each of the following experimental errors or variations might affect your results.
Suppose that you have 1.55grams of nitroglycerin( also known as nitroglycerine, trinitroglycerin, trinitroglycerine) in a 603.0 mili litres of steel container at 20 degree celsius and one atm pressure.
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