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To measure the amount of chloride ion that is in a water sample, an excess amount of silver nitrate is added to a 25.0 mL sample. If 5.195 mg of silver chloride is collected, what is the concentration of chloride in that sample in parts per million?
a 150.0 g sample of metal at 80 c is added to 150.0g of H2O at 20 c. the temperature rises to 23.3 c. assuming that the calorimeter is a perfect insulator, what is the specific heat of the metal?
In biological and medical applications, it is often necessary to study the autoionization of water at 37 degrees centigrade instead of 25 degrees centigrade. given that Kw for water is 2.5 X 10^-14 at 37 degrees centigrade, calculate the pH of pur..
a single atomic layer of oxygen atoms 5x1014 atomscm-2 collects on the surface of a 1 cm2 wafer of silicon. the silicon
30.0 mL of 0.150 M CH3CO2H are titrated with 0.150 M NaOH. What is the pH of the solution after 15.0 mL of NaOH has been added. The Ka for acetic acid is 1.80 x 10-5
190 ml of an hcl solution with ph of 2.60 is added to 200 ml of an hno3 solution. the resulting ph is 1.40. what was
Draw the structure of methanol (CH3OH). What is the approximate geometry of the electron groups around the oxygen atom
Calculate the change in enthalpy for the dissolving of sodium carbonate. Assume no heat lost to the surroundings and the solution has a specific heat capacity of 4.18 J/g°C.
What can we say about the temperature change of a sample of water when the value of q is negative
What mass of Fe will form when 63.0g of CO reacts with 145g of Fe2O3 according to the following equation? 3CO+Fe2O3->2Fe+3CO2.
60.0 mL portion of of 1.70 M solution is diluted to a volume of 288 mili litres. A 144-mili litres portion of that solution is diluted using 115 mLili litres of H2O. Determine the final concentration.
if air contains 78 n2 by volume what is the solubility of n2 in water of 25oc and 1 atm henrys constant kh for n2 in
Calculate the concentrations of all species in a 0.750 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
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