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The initial concentration of the reactant A in a first-order reaction is 1.2M. After 69.3 s, the concentration has fallen to 0.3M. What is the rate constant k? (hint: ln 2 = 0.693)
0.60 g of hydrogen chloride HCl is dissolved in water to make 7.5 L of solution. What is the pH of the resulting hydrochloric acid solution.
Determines the rate constant for this reaction and express and determine how many mL of a 0.157M solution of KOH is required to react with 0.385g of CH 3 COOH?
Exact potential difference in the concentration cell, What will be the exact potential difference in the following concentration cells?
Standardization of Na2S2O3, Added 0.12 g KIO3 and dissolved in 75 mL of distilled water. Added .20 g of KI to solution, then added 10 mL of 1M HCl and immediately titrated with thiosulfate solution (made by weighed 25 g of Na2S2O3-5H20
How many grams of diphenyl (C 12H10) must be dissolved in 655 g of benzene to lower the freezing point by 3 .20ºC.
Determine the limiting reactant if 140 grams of Calcium phosphate combines with 3.63 mol of sulphuric acid and also explain how many moles of calcium sulphate can be obtained?
Kp for the reaction of SO2(g) with O2 to produce SO3(g) is 3 × 1024 . Calculate Kc for this equilibrium at 25ºC. (The relevant reaction is 2SO2(g) + O2(g) 2SO3(g).)
Suppose your thermometer read consistently 1.0 o C lowered throughout both parts in the colligative properties lab. What effect would that have on your experimental value for the molar mass of your unknown solute?
Suppose the volume of this system is compressed to one-half its initial volume and then equilibrium is reestablished. what would be the new equilibrium total pressure.
How many grams of CaCl2 would be required to produce a 3.5 M (molar) solution with a volume of 2.0 L.
Titrations: Finding Concentration, A 35.00 mL solution containing an unknown concentration of pyruvic acid required 25.13 mL of 0.2011 M NaOH to reach the end point.
Polyethylene Density, (a) Which is the higher density of polyethylene, linear or branched? Select the choice with the best accompanying explanation.
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