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1. Which of the isomers of octane has only two peaks in its 13C NMR? Draw the structure of the alkane.
2. Draw the structure of the C4H9Cl isomer given the following proton NMR data:doublet ? 1.04 (6H)multiplet ? 1.95 (1H)doublet ? 3.35 (2H)
When 0.78 g of an unknown gas in contained solely in a 560 mL container, the pressure is 780 Torr at 5 degrees Celcius. What is the molar mass of the gas in grams/mole?
You have 250.0 mL of a 0.56M solution of sodium acetate. How many mL of 0.50M acetic acid should be added to make a buffer of pH 4.40.
The enthalpy change for melting ice at 0C and constant atmospheric pressure is 6.01 kJ/mol. Calculate the quantity of energy required to melt a moderately large iceberg with a mass of 1.40 million metric tons.
The Party Guy, Mr. Balloon, is making animal figures out of long thin balloons that he twists into different shapes. Assume that the balloons are of uniform thickness.
A reaction mixture initially contains 2.8M H2O and 2.6 M SO2. Determine the equilibrium concentration of H2S if Kc for the reaction at this temperature is 1.3 x 10^-6 ?
A 295mLflask contains pure helium at a pressure of 742torr . A second flask with a volume of 465mL contains pure argon at a pressure of 717torr .
What mass of sucrose should be combined with 453 of water to make a solution with an osmotic pressure of 8.00 at 320 ? (Assume the density of the solution to be equal to the density of the solvent.)
Distinguish between a bonding orbital and an anti bonding orbital in terms of their contributions
What is the molecular formula?
How many grams of F2 are needed to produce 157 g of PF3 if the reaction has a 79.8% yield?
calculate how many moles of KIO3 are needed to make 50 ml of 0.20 M solution?
For each solution, determine the number of moles of HAn and of An- ion at equilibrium. For each solution, caluate the HAn and An- ion molar equilibrium concentrations. Determine the reciprocal of the An- ion concentration for each solution.
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