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Problem- A 0.7500 g sample of commercial lye, NaOH, is dissolved in water and titrated with 35.00 mL of 0.5377 M HCl. What is the percent purity of the lye sample? (i.e., what is the mass percent of NaOH in the lye?)
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(A) What mass of Potassium hydrogen carbonate is needed? (B) What volume of 0.32 M HCl is needed to react completely with the amount of potassium hydrogen carbonate from 2(a)
The solubility product for barium sulfate is 1.10x10-10. Calculate ?G° in kJ/mol at 298 K. Report your answer with one decimal point.
calculate the heat released when 2.58 l of cl2g with a density of 1.88 gl reacts with an excess of sodium metal at
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.049 M in NH4Cl
Which is the equivalence-point pH if 25.0 mL HCOOH (1.8 x 10-4) requires 29.80 mL 0.3567 M NaOH to reach the equivalence point?
The most abundant isotope of uranium, ^238 U, does not undergo fission. In a breeder reactor, however, a ^238 U atom captures a neutron and emits two beta particles to make a fissionable isotope of plutonium, which can then be used as fuel in a nu..
1. we have a solution that is prepared when 525 grams of pbno32nbsp leadii nitrate dissolved in 1.250 liters ofnbsp
After treating the crude extract with activated carbon, the solution was somewhat lighter in color, but still quite dark. Knowing that trimyristin is in fact a white crystalline compound, why wasn't more activated carbon used in an attempt to remo..
cortisol m 362.47 gmol one of the major steroid hormones is a key factor in the synthesis of protein. its profound
The mass of proton is 1.673*10^-24 g. The mass of a neutron is 1.675*10^-24 g. The mass of the nucleus of a 56Fe atom is 9.289*10^-23 g. What is the nuclear binding energy in (j) for a 56Fe nucleus. (C=3.00*10^8 m/s)
What is the molar mass of the unknown acid? B) As the acid is titrated, the pH of the solution after the addition of 15.00mL of the base is 9.46. What is the Ka for the acid?
What is delta G for the transfer of 6 mol K+from blood plasma to the cellular fluid at body temperature(37C). What is the minimum amount of work that must be used to transfer this K+
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