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Which of the following is the better chemical for removing calcium ions from water. Make sure you show the calculations necessary to justify your answer. Ignore calcium complexes. a) NaOH b) K2CO3 c) K2SO4 d) KF
A gasous mixture of O2 and Kr has a density of 1.104 grams per liter at 435 torr and 300 K. What's the mole percent of O2 in the mixture?
A certain second-order reaction has a rate constant of 1.10×10-3 at 27 C and an initial half-life of 226 . What is the concentration of the reactant after one half-life?
What is the reducing agent and what has been reduced. What quantity of iodine can be obtained if 20.0g of NaI is mixed with 10.0g of MnO2
How much energy is released when 32.4 g of water freezes? The heat of fusion for water is 6.02 kJ/mol. q=? kJ
sodium hydroxide (NaOH) pellets are dissolved in water to make 8.0 L of solution. What is the pH of this solution?
A solution containing Pt4+ is electrolyzed with a current of 5.00 A. How long will it take to plate out 77% of the platinum in 0.50 L of a 0.010 M solution of Pt4+?
After emptying the water and drying the flask, it was filled with ethylene glycol. it now weighed 338.72 grams. what is the specific gravity of the ethylene glycol?
Paper pulp produced by kraft/sulphate process is A. bleached easily B. dull white in color C. strong fibrous D. dark colored 2. Claude process of gas liquefaction employs A
(a) molarity of the solution resulting from dissolving 51.8 g of silver nitrate in enough water to give a final volume of 364 mL (b) volume in liters of 0.494 M manganese(II) sulfate that contains 53.1 g of solute
what is the density of a sample of ammonia gas if the pressure is 705 mmHg and the temperature is 63.0 degrees C
explain the apparent paradox. although the addition of one equivalent of HX to an alkyne is more exothermic than the addition of HX to an alkene, an alkene reacts faster
Calculate the amount of energy in kilojoules needed to change 117 of water ice at 10 to steam at 125 . The following constants may be useful.
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