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What volume of a 0.750 M solution of hydrochloric acid can be prepared from the HCl produced by the reaction of 25.0 g of NaCl with an excess of sulfuric acid
Write reactions and equilibrium relationships for the first four complexes formed between cadium(II) and chloride
Consider the following reaction- 2A + B ? 3C + D If 63.0 mol A and 42.0 mol B react to form 54.0 mol C. What is the percent yield of this reaction
Combustion analysis of a 13.42 g sample of equilin which contains only carbon, hydrogen, and oxygen produced 39.61 g CO2 and 9.01 g H2O. The molar mass of equilin is 268.34 g/mol. Find the molecular
When 0.234 g of the hydrate Cr2(SO4)3•xH2O is heated, 0.128 grams of anhydrous Cr2(SO4)3 remains. What is the value of x in the formula for the hydrate
After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. Assuming that only the magnesium carbonate had decomposed, how much magnes
What mass of chromium(III) oxide would be needed in order to obtain 850 grams of chromium metal
Antimony has two naturally occurring isotopes, Sb-121 (mass = 120.9038 amu) and Sb-123 (mass = 122.9042 amu). Calculate the percent abundances of these isotopes of antimony
As is often said, quantum mechanice yields classical mechanics when h approaches 0. What result is obtained classically for p(v,T) when h approaches 0? Why is this relation unsatisfactory
Show that the function si=x*e^(-ax^2) is an eigenfunction of the operator d^2/dx^2 - 4(a^2)(x^2). What is the eigenvalue.
Sulfuric acid (H2SO4) is prepared commercially from elemental sulfur using the contact process. In a typical sequence of reactions, the sulfur is first burned
What is the uncertainty in the energy of the excited state. What is the percentage uncertainty if the energy is measure from the ground state
Aqueous potassium iodide reacts with aqueous copper(II) nitrate to form a mixture of solid copper(I) iodide, solid iodine, and aqueous potassium nitrate.
These changes are brought about by a heater that supplies heat at a constant rate of 1000 W. Sketch graphs showing a) the temperature vs. time b) the enthalpy vs. time c) Enthalpy vs. temperature fo
A solution is prepared by dissolving 13.4 g ammonium sulfate in enough water to make 133.0 mL of stock solution. A 11.90 mL sample of this stock solution is added to 52.50 mL of water. Calculate the
A 13.7g sample of an unknown gas occupies 15.5L at a temperature of 17 CELSIUS and a pressure of 743 mmHg. What is the molar mass of the gas
Patients with a high body temperature are often given "alcohol baths." The heat of vaporization of isopropyl alcohol (rubbing alcohol) is 159 cal/g. How much heat is removed from the skin by the eva
Water's heat of fusion is 80. cal/g, and its specific heat is 1.0 cal/g.celsius. Some velomobile seats have been designed to hold ice packs inside their cushions.
An aerosol spray can of deodorant with a volume of 210mL contains 3.4g of propane gas as propellant. Part A What is the pressure in the can at 20 celsius
An optically activated alkyne A(C10H14)can be catalytically hydrogenated to butylcyclohexane. Treatment of A with C2H5MgBr liberates no gas.
A compound A(C6H6) undergoes catalytic hydrogenation over lindlar catalyst to give a compound B, which in turn undergoes ozonolysis followed by workup with aqueous H2O2 to yield succinic acid and tw
Assuming it is composed entirely of 206Pb, 207Pb and 208 Pb and the percentages of the two lightest isotopes are equal, calculate the relative percentages of these isotopes in the natural element.
Solid iron reacts with chlorine gas to produce iron(III) chloride. If 10.0 grams of iron reacts with excess chlorine gas and 18.5 grams of iron(III) chloride is produced, what is the percent yield o
A certain lead-sulfur compound contains 86.59% Pb by mass and the remainder is sulfur. What is the empirical formula of the compound
What volume of a 0.2089 M solution of aqueous potassium iodide will contain enough potassium iodide to react exactly with the copper(II) nitrate in 43.88 mL of a 0.3842 M solution of aqueous copper(