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Determine the pH at the equivalence (stoichiometric) point in the titration of 52.8 mL of 0.537 M HNO2 by 0.350 M LiOH. The Ka of HNO2 is 4.3 x 10-4.
What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when 32.0 g of NH4NO2 decomposes at 25 degrees C
Which of the following set of quantum numbers (ordered n, l, ml, me ) are possible for an electron in an atom
If the sample contains a combined total of 1.75 grams per mole and has a total mass of 51.0 grams, what are the percentages of CO2 and Ne in the sample by mole?
Fe(NO3)3, 5 drops of 0.1 M KCNS why are ions present when you mix those solutions? I also conducted the experiment using an unknown and got the same results for both.
You need to make a 500 mL buffer containing 35 mM NaCl and 50 mM Tris buffer. You already have a 5 M NaCl stock solution and a 1 M
In the liver, which one of the following is part of the pathway whereby increased glucagon causes a decrease in the glycolytic pathway? activation of the fructose-2,6-bisphosphate and inhibition of phosphofructokinase-2
Suppose that a student performing this experiment recorded the concentration of NaOH solution as 0.513 M, instead of the correct value of 0.531 M.
How much ice (in grams) would have to melt to lower the temperature of 352 mL of water from 26 C to 4C? (Assume the density of water is 1.0 g/ml.)
Calculate the pH of each of the following solutions ( Ka and Kb values are given in Appendix D in the textbook). 0.115 M hydrogen chromate ion (HCrO4^-)
The amount of energy needed to heat 2.00 g of carbon from 50.0°C to 80.0°C is 42.6 J. The specific heat capacity of this sample of carbon is ?
Find the mass of sodium required to produce 5.68 L of hydrogen gas at STP from the reaction described by the following equation: 2 Na + 2 H2O ® 2 NaOH + H2
when companies sell compressed gas in steel cylinders, they usually quote the contents as volume of gas at 1 atm pressure at tempertaure of 20 degrees celcius.
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