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Phosphorus-32. is a radioactive isotope with a first order constant of 0.0485 days-1.if a sample has an initial mass of 0.48g of phosphorous-32,how much of the isotope remains after 15.5 days?
the kinetic energy of a rolling billiard ball is given by rmke 12mv2 . suppose a 0.17-rm kg billiard ball is rolling
the solubility of oxygen in water is 14.74mgl at 0 celcius and 7.03mgl at 35 celcius. estimate the solubility at 50
Many household cleaning products contain oxalic acid, H2C2O4, a diprotic acid with the following dissociation constants: ka1= 5.9*10^-2, ka2=6.4*106-5 Calculate the equilibrium concentration of HC2O4^- in a 0.20 M solution of oxalic acid.
waters heat of fusion is 80. its specific heat is 1.0 and its heat of vaporization is 540. a canister is filled with
After a dose, the concentration of medication in the blood declines due to metabolic processes. The half-life of a medication is the time required after an initial dosage for the concentration to be reduced by one-half. A common model for this pro..
Two different proteins X and Y are dissolved in aqueous solution at 37 C. The proteins bind in a 1:1 ratio to form XY. A solution that is initially 1.00 mM in each protein is allowed to reach equilibrium. At equilibrium, 0.18 mM of free X and 0.18..
Using curved arrows to symbolize the flow of electrons, write the stepwise mechanism for the bromination of anisole to provide the major monobromination product. Write the resonance structures for any charged, delocalized intermediates that are in..
EDTA is utilized to slow microbial degradation of mayonnaise by preventing bacterial uptake of iron. Assuming that mayonnaise has a pH of 3.9 and a total iron content of 10-6 mole/liter, how much EDTA must be added to complex 99% of the total Fe
you want a solution that will buffer the addition of either 10 micro moles of acid or 10 micro moles of base. total buffer concentration is equal to the concentration of the acid plus the concentration of salt in the acid. which of the following b..
Example on how to make up a buffer: A student has 100 mL of 0.1 M acetic acid and has plenty of 0.1 M sodium acetate and wants to make up a buffer with pH = 5.1.
If 250 ml of H2SO4 of unknown concentration with a methyl orange indicator present is titrated with [0.345 M] NaOH, the red solution turns yellow after 20.4 ml of the NaOH is added. What is the molarity of the H2SO4 solution
thermodynamic tables and charts may be used when both H and S are tabulated. since G=H-TS , at constant temperature , deltaG=RT LOG(f2/f1)= delta H- t*deltaS
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