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Write down the electron configuration energy versus atomic number (across a row) is not linear. Where are the exceptions? Why is there exception?
Determine the molarity of a solution prepared by dissolving the 225 g, potassium nitrate, KNO3, in 785 g water? The molar mass in g/mol of K = 39.1, N =14.0 and O =16.0 The density of the solutio
If the density of the metal is 8.96 g/cm3, determine the unit cell edge length in pm? Copper crystallizes in a face-centered cubic lattice (the Cu atoms are at the lattice points only).
What volume of a 14% solution of NH4Cl which has a density of 1.04g/cm3 is required to supply the 15.0 g of NH4Cl if a reaction requires 15.0 g of ammonium chloride?
Write down a balanced equation for the combustion for C6H12 (l) to form CO2(g) andH2O(l) when the Cyclohexane, C6H12, is a liquid hydrocarbon at room temperature.
The starting place for making a bonding/structural model for a molecule is the Lewis structure. For the following molecules, choose the correct total number of valence electrons.
Which is a faster SN2 reaction: displacement on the acetate ion on bromoethane or on bromo cyclo-hexane? The Sn2 displacement with hydroxide ion on CH3CH2I in ethanol or in DMF
Calculate the molarity and normality of the H2SO4 solution if the 77.60 ml of .210 M NaOH are needed to neutralize the 25.05 ml ofH2SO4 solution in a titration experiment.
Calculate the volume of the acetic acid solution necessary to neutralize 25.0mL of 0.10M NaOH when assuming the density of a 5%acetic acid solution is 1.0g/mL.
Explain the minimum Ca2+ concentration that will cause precipitation when the compound Ca3 (PO4)2 has a Ksp of 2.0 x 10-29 and the phosphate ion concentration is adjusted to a valu
If we assume that Ka for HCl was 1x107, what would be the Kb for its conjugate base? Explain what is that base?
The following is an acid-base equilibrium problem. Benzoic Acid is a solid. 15.000grams is dissolved in the distilled water and diluted to 200.00ml.
At 70 deg C a closed flask contains water. The total pressure of the air-and-water-vapor mixture is 500.0 torr. Determine the partial pressure of the air in this flask? Use your book for the vapor
Demonstrate the mess you would get if you tried to synthesize asymmetric ether via acid-catalyzed dehydration. Explain what two alcohols would you use if your goal was to synthesize butyl hexyls eth
What two alcohols would you use if your goal was to synthesize butyl hexyls ether via acid-catalyzed dehydration of two alcohols? Synthesize asymmetric ether via acid-catalyzed dehydration.
The gases phase reaction: N2 + O2 ó 2NO has an equilibrium constant of4.00x10-4 at a given temperature. Explain what will be the concentration of NO at equilibrium, if1.00 moles of
The conditions (sulfuric acid and heat) are also conducive to elimination products. Synthesizing ethers via acid-catalyzed condensation reactions has limited usefulness.
Benzoic acid (C7H6O2, 1.9862 g) was ignited in a bomb calorimeter which is having the water (2 kg) as the primary heats ink. The temperature increase observed was 3.83 degrees Celsius. Where the he
The calorimeter contained 500 g of water and the temperature rise measured was 1.40 degrees Celsius. A sample of magnesium metal (0.1946 g) was ignited in a constant-volume calorimeter of heat capac
A 2.00 ml portion of this solution was placed in a 100 ml volumetric flask and diluted to the mark with demonized water. A 1.50 g sample of an iron containing compound was dissolved in the 100.0 ml
Determine the numbers of grams of oxalate (C2O4-2) were present in the reaction? Explain what percent of the unknown compound is oxalate?
Determine how many grams of soluble calcium phosphate would be found in a person's mouth when the mineral content of your teeth is largely calcium phosphate and the amount of saliva in the average
Since argon is normally a colorless gas, explain in a couple of complete sentences where the color is coming from. When electrical current is applied to a clear, sealed glass tube filled with
Explain why is the preparation of alkyl napthyl ether under phase transfer conditions not possible starting with alkyl alcohol and 2-bromonapthalene?
Demonstrate the mechanism of the electrophonic aromatic substitution of sec-butyl benzene, show the desired product and the unwanted side products.