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Calculate the work done in joules whne 2.5 mol of H2O vaporizes at a constant pressure of 1.0 atm and at a temperature of 25 degrees c. Assume the volume of liquid H2O is negligible compared to that of vapor. Given 1 L atm = 101.3
To convert this into a buffer having a pH of 9.3380, how many grams of KH2BO3 (M.W. 99.926) should be added to the solution?
Calculate the freezing point and boiling point of each of the following solutions using the observed van't Hoff factors(a) 0.064 m MgCl2
calculate the pKa value of the acid and determine the number of moles of acid initially present.b) when the reaction is complete, what is the concentration ratio of conjugate base to acid?
The heat combustion of naphthalene is -40.1kJ/g. When 0.8210g of naphthalene was burned in a calorimeter containing 1,000g of water, a temperature rise of 4.21 degree celcius was observed
If 1.20 grams of sodium metal are reacted with 4.00 mL of water, how many grams of NaOH will be produced. (The density of water = 1.00g/mL)
Calculate kp and kc for the dissociation.
Express the concentration of a 0.0620 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
Write and balance the full chemical equation for the reaction between lithium bromide and silver (I) nitrate. (2) How much 0.235 M lithium bromide solution
A sample of oxygen gas collected at a pressure of 0.623 atm and a temperature of 280 K is found to occupy a volume of 634 milliliters. How many moles of O2 gas are in the sample? answer in mol please
Given the following equation, how many grams of PbCO3 will dissolve when 5.0 L of 1.50 M H+ is added to 6.00 g of PbCO3
to find the by mass of a compound in a given sample.dissolving 3.00 g of an impure sample of calcium carbonate in
Calculate the pH at the equivalence point in a titration 45.7 mL of 0.17 M chloropropionic acid with 0.4 M KOH.
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