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Consider a 0.20 M NH3/0.20 M NH4CI bufffer. 0.002500 mol of HCI is added to 65.0 mL of the buffer. How many moles of NH3 and NH4+ remain once the solution has equilibriated? The ka for the equilibrium is 5.6 x 10-10
what are some examples of biomolecules that are detected by studying their activities
What volume of a stock 0.0242 M of KOH solution is required to titrate 0.147 g of oxalic acid dehydrate, H2C2H4 . 2H2O to a phenolphthalein endpoint?
Boron nitride, BN, has a graphite-like layered structure in which the layers have eclipsed alignment where the B and N atoms in alternative layers in the direction perpendicular to the layers.
Infrared spectroscopy----How would you know if you used too much liquid and what would you do about it. what will damage the salt plates
A soft drink contains 39mg of sodium in 286g of .H2O What is the concentration of sodium in the soft drink in mass percent
what is the number of bond pairs and shapes of c2h4 c2h6 and
Which is the best description of hydrogen bonding? The temporary attraction between hydrogen atoms on different molecules resulting from shifts in electron density The association between a hydrogen atom which is somewhat positive because it is bo..
a particular coal contains 2.5 sulfur by mass. when this coal is burned the sulfur is converted into sulfur dioxide
A certain reaction, a+b=c is the first order with respect to each reactant, with k=1.0x10-2l.mol-1s-1. Calculate the concentration of A remaining after 100s if the initial concentration
A concentration of the pollutant NO2 in air of 3.00 ppm (m/v) may be lethal to humans. Will air that contains 1.9 x 10^-3g at NO2 per liter be lethal to humans?
What volume of hydrogen gas, in liters, is produced by the reaction of 4.17g of iron metal with 60.0 mL of 3.00M HCl?
Describe each reaction and provide the name of all the chemical formula involved for each number.
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