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A sample of hard water contains 20mg of Ca++ ions per liter. Explain how many milliequivalents of Na2Co3 would be required to soften 1 liter of sample?
the data in the table below were obtained during a colorimetric determination of glucose in blood serum.glucose
Calculate the radiation dosage (in grays) for an 85-kg person that is exposed for 7.0 seconds to a 3.0 Ci source of beta radiation. Assume that 100% of the radiation is absorbed and each beta particle has an energy of 1.7× 10-13 J.
How do we know if H2O formation, as one of the products of a rxn, will be liquid or gas. referring specifically to problem 20.112:
At 25 degrees Celsius the rate constant for the decomposition of a pesticide solution is 6.40e-3 min-1. If the starting concentration of pesticide is 0.0314M, what concentration will remain after 62.0min at 25 degrees Celsius
Calculate the molar solubility of Mn(OH)2 in moles/L and in g/L. What would happen to the solubility of Mn(OH)2 when 0.02 M NaOH is added to the solution. Calculate the new solubility after the addition of NaOH.
The molar mass of a protein is determined from a measurement of the osmotic pressure. If 0.01 grams of the protein is dissolved in 1 ml. and osmotic pressure
Explain what is the annual chemical cost of treating 0.050 m3/s of this water. Presume the lime is 90% pure and the soda ash is 97% pure. State the ion concentrations reported below are all mg/L as CaCO
A student prepared a stock solution by dissolving 20.0 grams of KOH in enough water to make 150 mL of solution. SHe then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentra..
sodium thisulfate na2s2o3 is used as a fixer when developing photographic film. what is the mass in grams of na2s2o3
how much money would you spend on gas in one week if gas costs 1.10euros per liter and your car's gas mileage is 39.0mi/gal ? Assume that 1euro=$1.26 dollars.
Calculate the volume of carbon dioxide at 20.0C and .950 atm produced from the complete combustion of 2.50 kg of methane. Compare your result with the volume of CO2 produced from the complete combustion of 2.50kg of propane (C3H8)
Answer the following questions: a) can Al3+(aq) oxidize tin (Sn) under standard-state conditions?; b) would it be OK to store an aqueous AlCl3 solution in a tin container?; c) can Sn2+(aq) oxidize aluminum (Al) under standard state conditions?; d)..
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