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Draw the Lewis structure of the perbromate ion with an octet on bromine and one example of each resonance form with an expanded octet on bromine. Using formal charges, determine the best structure f
Compare the bond order of the carbon-to-carbon bond in the diatomic molecule C2 that you would establish from a Lewis structure and from a molecular orbital diagram. Why are the not the same?
An electrochemical cell passes 2 moles of electrons for its balanced equation as written. At 290.97 K, the cell voltageis 0.88272 volts. At 256.65 K, the cell voltage is 1.06459volts.
A certain batch of fireflies were observed to "flash" at the rate of 10.9 times per minute at 25°C and at the lower rate of 5.9 times a minute at a temperature of 15°C.
If 50 mL of water at 22.3 degrees Celsius is mixed with 50 mL of water at 47.7 degrees Celsius in such a way that no heat is lost to the environment, what will be the temperature of the final mixtu
At 450°C ammonia gas decomposes into hydrogen and nitrogen gases. An experiment starts by placing 2.25 moles of ammonia in a3.00 L container and heating it to 450°C.
A small sample of wood from an archeological site in Clovis,New Mexico, was burned in O2, and the CO2 produced was bubbled through a solution of Ba(OH)2 to produce a precipitate of BaCO3.
When measured in a 1.00 cm cuvet, a 8.50 X 10-5M solution of species A exhibited absorbances of 0.129 and 0.764 at475 nm and 700 nm,respectively. A 4.65 X 10-5 M solutionof species B gave absorbance
A battery is constructed based on the oxidation of magnesium and the reduction of Cu2+. The initial concentrations of Mg2+ and Cu2+are 1.0*10^-4 M and 1.4 M, respectively, in 1.0 Lhalf-cells.
At half equivalence 12.65 mL of 0.0395 NaOH is titrated with a10.00mL of a weak acid of unknown concentration. The titration reaches equivalence once 25.3 mL of NaOH have been added.
Review of McMurry Section 2.9 shows that an equilibrium between two acids will result in the equilibrium favoring formation of the weaker acid (lower pKa value).
A reaction mixture in a 10.00 liter flask contains5.0 moles each of hydrogen and fluorine gases plus 1.6 moles of HF.What will be the concentration of hydrogen when this mixture reaches equilibrium?
An aqueous solution is prepared by diluting 3.30 mL acetone,CH3COCH3, (d=0.789 g/ mL) with water to final volume of 75.0 mL. The density of the solutionis 0.993 g/mL.
If the explosion is carried out by heating one kilogram of ammonium nitrate sealed in a rigid bomb with a volume of oneliter, what is the total pressure produced by the gases before the bomb rupture
Why does the alcohol become a double bond instead of remaining analcohol? Doesn't it only turn into a double bond if it is dehydrated?
The US consumed 48 EJ of petroleum in 2000. How many square meters of PV collectors would be needed to supply the equivalent amount of energy in hydrogen?
A 15.0-mL sample of NaCl solution has a mass of 15.78 g. Afterthe NaCl solution is evaporated to dryness, the dry salt residuehas a mass of 3.26 g. Calculate the following concentrations for the NaC
A container has 0.95 mol of N2, 1.45 mol O2, 0.24 mol Ar, and the pressure of the container is 2.45 torr. Calculate the Partial Pressures of each gas in the container.
How will the volume of a gas sample change if its temperature is increased? Explain without using the ideal gas law equation.
How will the temperature of a gas sample change if its volume is decreased, assuming everything else is the same and the gas container is isolated from the surroundings so that no heat transfer betw
For the decomposition of an antibiotic in aperson with a normal temperature of 98.6 F, k=0.0000250 s^-1. For a person with a fever of 102.1 F, k=0.0000259 s^-1
At an acetylcholine concentration of 2.5×10-4M, what fraction of acetylcholinesterase has bound acetylcholine? Thatis, what is the ratio [ES] ? [E ]T
Tartaric acid, H2C4H4O6 , has two acidic hydrogens. The acid isoften present in wines and precipitates from solution as the wineages. A solution containing an unknown concentration of the acid istit
Consider one of the resonance structures of the nitrate ion,NO3‾. What is the formal charge of one of the oxygen atoms singly-bondedto nitrogen?
1.50mL of 0.10mol/L hydrochloric acid solution is added to25.00mL of the diluted buffer solution . Calculate the pH after the addition of the hydrochloric acid solution.