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Certain metal cations can act as Lewis acids in water to produce an acidic solution even though the metal ion contains no hydrogen ions at all. Water hydrates the ions in solution and the partial loss of electrons from the water allows a hydrogen ion to be lost. What is the pH of a 0.1859 M solution of Fe2+ ions, if it has a Ka of 1.3000e-6?
Natural lithium is 92.58% lithium-7, with atomic weight 7.016, and 7.42% lithium-6, with atomic weight 6.015. What is the observed atomic weight of lithium as it occurs in nature?
the electron in the n=5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
The combustion of ethane produces carbon dioxide and steam: 2C2H6 + 7O2 --- 4CO2 +6H20 How many moles of CO2 are produces when 5.55 mol of ethane are burned in an excess of oxygen.
Assume that fructose is a molecular solid and does not ionize when it dissolves in water.
An aqueous solution contains 4.20% NH3 (ammonia) by mass. The density of the aqueous ammonia is 0.979 g/mL. What is the molarity of NH3 in the solution?
You are given some reactions as a. Cl2(aq) + 2NaI(aq)= I2(aq) + 2 NaCl(aq), b. Br2(l) + 2K(S)=2KBr(s), c. Pbs( s) + 4H2O2(aq)= PbSO4(s) + 4H2O(l) you just need to Indicate which element is reduced and which is oxidized in the given equations?
Write the mechanism for the aldol condensation of two molecules of propanal
How many grams of CO2 are produced by the complete combustion of 2.00g of C8H18?
Electrophilic Substitution, Which compound is more reactive toward electrophilic substitution (e.g., nitration)? Explain you reasoning.
A room of volume of 2 cubic meters is initially at 19 C and 101 kPa. A block of dry ice (solid carbon dioxide) is dropped into the room and then the room is sealed (air tight)
If the temperature of a sample of gas with an initial volume of 1.75 is increased form 15.0 c to 30.0c, what will the final volume be.
Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
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