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State a solution with density of 0.935 g/mL contains 37.8% H2CO, 15.0% C2H5OH, and 47.2% water by weight. Define is the molarity of H2CO?
A solution transmittance is 35% at 260 nm. What will the solution absorbance be if you dilute 25.0 ml
Calculate the acitivation energy for the decomposition. b) To test solubility, 0.020 mol of solid lead iodide, PbI2, is added to 0.500 L of water. after eqilibrium has been established 0.00076 mol of Pb^2+ (aq) and 0.00152 mol of I^- (aq) are pres..
When 190.0 mL of 0.360 mol are added to 190.0 mL of 1.00×10?2 M AgNO3 (aq), what percentage of the Ag+ is left unprecipitated?
Exactly 500 cubic centimeters of a gas at 1 atmosphere and 0 degrees Celsius weighs 0.581 grams. The composition of the gas shows it to be composed of only carbon and hydrogen, the carbon being 92.24%. What is the molecular formula of this gas
A 75.0 mL volume of 0.200 M NH3 (Kb=1.8*10^-5) is titrated with 0.500 M HNO3. Calculate the pH after the addition of 13.0 mL of HNO3.
a. Provide equation for the complete combustion of ethylbenzene. b. Provide an equation for the partial combustion of acetylene. c. If 100 kg o both material where available, which hydrocarbon (ethylbenzene or acetylene) would produce the most wat..
You carry out a titration of a pure weak triprotic acid and only see two major pH jumps. One at 10.0 mL and one at 15.0 mL. At what volume is the other equivalence point
Calculate the pH of the buffer system if 2.00 moles of H3PO4 and 1.00 mole of NaH2PO4 are present in 1.00L of a solution
You are asked to prepare a buffer with a pH of 4.04. calculate the volumes of 1.00M solutions of formic acid (HCOOH) and sodium formate (NaHCOO) needed to produce 200mL of the buffer
or a certain reaction kc2.2104 and kf0.284 m-2 s-1. calculate the value of the reverse rate constant kf given that the
Describe the preparation of 12 mL of a 0.050 M solution of each of the halogens, using the reactions in the preceding question. Available to you are solid Ca(OCl)2
0.80g of hydrogen chloride is dissolved in water to make 2.5L of solution. What is the pH of the resulting hydrochloric acid solution?
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