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What is the pH of a solution containing 0.001 M NaHCO3 and 0.002 M NH3? You may assume that both the carbonic acid system and the ammonia system are closed, i.e., CT = constant for each case)
a 100 g sample of water at 23C is added to a 45 g sample of water at 99C. what is the final temperature of the sample
If the temperature of 150.0g of water increased from 23.3C to 44.8C, how much heat was absorbed.
What do understand by the terms a) Empirical Formula b) isomerism and what conclusions can you draw from the following observations about the chemical nature of the organic liquid D?
Calculate the pH of a solution when 0.200 moles of solid NaOH is added to 2.00 liter of 0.250 M HCl. Assume no change in volume.
A certain mass of oxygen was collected over water when potassium chlorate was decomposed by heating. The volume of the oxygen sample collected was 720. mL at 25.0 oC and a barometric pressure of 755 torr.
Empirical and Molecular Formula of Cadaverine, Cadaverine, a substance produced by the action of bacteria on meat, contains 58.55% C , 13.81% H , and 27.40% N.
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
Calculate the freezing point of the following solutions, assuming complete dissociation. Part A= 0.114mK2S Part B=20.5g of CuCl2 in 401g water Part C=6.5% NaNO3 by mass
Concentrated hydrochloric acid is 38% HCl by weight and has a density of 1.19 g/mL. A solution is prepared by measuring 25 mL of the concentrated HCl,
A patient needs to take 625 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 625 mg dosage? Assume that these pills are scored and can be cut in half if ne..
What is the mass of 8.00 1022 molecules of tetraphosphorus decaoxide? (b) How many P atoms are present in this sample?
A solution is prepared by mixing 75.0 mL of 5.00 M HCl and 40.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
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