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How many molecules of carbon dioxide are produced when 130 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water
What is mass (in g) of copper can be recovered from 49.9 mL of a 0.628 M solution of copper(I) chloride and excess hydrogen
A solution is 0.10 M AgNO3 and 0.10 M Ba(NO3)2. If solid Na2SO4 is added to the solution, what is [Ba2+] when Ag2SO4 begins to precipitate? (Ksp BaSO4 = 1.1 x 10-10; Ag2SO4 = 1.1 x 10-5)
Thallium and indium form +1 and +3 oxidation states when in compounds. Predict the fomulas of the possible compounds between thallium and oxygen and between indium and chlorine. Name the compounds
In the titration of a solution of the extremely weak acid, HCN (Ka = 6.2 x 10-10), by a solution of sodium hydroxide of equal concentration,
What is the theoretical yield (in mol) of carbon monoxide when 2.62 mol oxygen reacts with 2.08 mol of ethanol (CH3CH2OH) to produce carbon monoxide and water
An equilibrium mixture of NO(g), O2(g) and NO2(g) is allowed to expand from 1.0 to 2.0 L at a constant temperature. Given that 2 NO(g) + O2(g) <=> 2 NO2(g) which of the following statements is
How many total moles are produced when 0.69 mol of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon dioxide and water
What is the experimental yield (in g of precipitate) when 15.4 mL of a 0.6 M solution of iron(III) chloride is combined with 19.8 mL of a 0.719 M solution of lead(II) nitrate at a 80.1% yield
What is the equilibrium concentration of Cu+ (aq) in a solution that is 0.0200M solution in CuNO3 and 0.450M HCl (aq)
What is the limiting reactant when equal masses of iron(III) chloride and potassium phosphate react in solution?
What is the solubility in pure water of Ba(IO3)2 in moles per liter at 15 ?C? [Ksp (15 ?C) = 2.0 x 10-10]
there is a difference between the average distance r between the electron and the nuckeus and the most probable distance between the electron and the nucleus. (a) derive the expression for the avera
Transition from the n=7 to n=2 level of the hydrogen atom yields a photon at the edge of human visual perception. Determine the energy and wavelength of this light.
At a certain temperature 16.7 mL of .45 M NaOH solution is required to titrate 30.0 ML of a 0.1 M KCL solution saturated with potassium bitartrate. What is the Ksp of KHT at this temperature
If water at the boiling point is saturated with potassium hydrogen tartate, 30 mL of the solution requires 49.5 mL of 0.2 M NaOH in a titration. What is the KSP of potassium hydrogen tartate at this
A physiological saline solution is 0.92% sodium chloride (NaCl) by mass and has a density of 1.005 g/mL. What is the osmotic pressure of such a solution at body temperature of 37 degree C
Equal volumes of 1 x 10-5 M solutions of Cd2+ and CO32- ions are mixed in one flask and equal volumes of 1 x 10-5 M solutions of Ag+ and CrO42- ions are mixed in a second. Which substances precipita
Free radicals are important in many environmentally significant reactions. For example, photochemical smog, which forms as a result of the actions of sunlight on air pollutants, is formed in part by
What is the numerical value (ignore units) of the equilibrium constant for the following reaction
use the appropriate standard reduction potentials to calculate the value of k at 25 degrees celcius for this reaction
Calculate the molality of a hydrochloric acid solution that is 26.4% by mass and has a density of 1.19 g mL^-1
Fluorine 18, which has a half live of 110 min, is used in PET scans. If 100 mg of fluorine 18 is shipped at 8am, how many mg of the radioisotope are still active if the sample arrives at 130 pm
A gaseous mixture has a volume of 240L and a pressure of 1.35atm at 24*C. The mixture is 67% He and 33% Kr by mass. What is the mass of Kr
50.0 mL of Ba(OH)2 is titrated to the final equivalence point with 19.34 mL of 0.250 M H3PO4. What is the concentration of the original Ba(OH)2 solution