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Suppose you are making some tea and have boiled water and added leaves to the water. Then you realize you cannot find the strainer. You look for a piece of cloth, but cannot find one. What method would you apply for a cup of tea without leaves.
Problem- If you need to make a phosphate buffer made with NaH2PO4 and Na2HPO4 that is 0.010M total concentration and has a pH of 7.4, how much of each salt would you need to weigh out in order to make 150mL of total buffer solution
Calculate the ph when 47.0 mL of 0.309 M of a certain monoprotic weak acid, HA, is mixted with 47.0 mL of 0.309 M of sodium hydroxide solution
Hydrogen peroxide can be prepared by the reaction of barium peroxide wtih sulfuric acid accoridng to BaO2(s) + H2SO4(aq) arrow BaSO4(s) + H2O2 (aq) How many milliliters of 2.00 M H2SO4 (aq) are needed to react completely with 49.5 g of BaO2(s)
2.914 gram sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 degrees celcius in a crucible until a constant mass is reached.
suppose that ethanol of 130 g at the normal temperature of 25 degrees celsius is combined with ethanol of 250 g at 81
strip of magnesium reacts in 3.0 mL of 5.0 M HCl over a given period of time. Evaluate the mol mg/mol HCl ratio for the reaction.
At a certain temperature the vapor pressure of pure benzene and pure toluene are 380 torr and 130 torr, respectively. If 7.50 mol benzene is mixed with 6.64 mol toluene
27.0ml of 0.11 m hclis aded to 0.37 g of a commercial antacid. the solution is titrated with 9.7 ml of 0.09 m naoh to
If the activation energy for the decomposition of a compound is 99.1 Kj/mol, at what temperature will the rate be 10 percent greater than its rate at 25C
oes this result mean that the change in enthalpy of this process must be negative in order for the process to be spontaneous under standard state conditions? How come?
A buffer is prepared by adding 115mL of 0.30 M NH3 to 145mL of 0.15 M NH4NO3. Explain what the pH of the final solution is. Kb= 1.8x10-5
a compound vortex in a large tank of water comprises a forced vortex core surrounded by a free vortex. determine the
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