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Consider the titration of 50.0 mL of 0.217 M hydrazoic acid (HN3, Ka = 2.6 x 10-5) with 0.183 M NaOH. Calculate the pH of the solution after addition of 29.7 mL of NaOH solution.
A.) If 75.0 g of sodium is mixed with 40.0 g of nitrogen gas, what mass of sodium nitride forms? B.) If the reaction in part A has a percent yield of 90 % , how much sodium nitride is actually produced
An aqueous solution containing 5.85g of an optically pure compound was diluted to 800.0mL with water and placed in a polarimeter tube 10.0cm long. The measured rotation was -5.93degrees at 25degrees C. Calculate the specific rotation of the compou..
A solution contains 0.35 mol of isopropanol (C3H7OH) dissolved in 0.85 mol of H2O. What is the molarity of this solution
a gas sample was collected over water at 25.3 degrees celcius. the total pressure is determined to be 0.97 atm. what is the partial pressure of the gas that is collected?
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change.
DNA double helix has the sequence GATCGATTAC, what is the sequence of the other DNA strand?
You are given solutions of HCl and NaOH and must determine their concentrations. You use 27.8 mL of NaOH to titrate 100. mL of HCl and 22.8 mL of NaOH to titrate 50.0 mL of 0.0790 M H2SO4.
how to draw mechanisms for organic chemistry? Would really like to learn how to draw them.
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0 {\rm L} and which contains {\rm O_2} gas at a pressure of 16500 {\rm kPa} at 23^\circ C.
Provide a stepwise mechanism for the reaction, showing all electron movement using the curved arrow convention. Sketch a qualitative energy level diagram for the mechanism labeling all relevant points.
What is the density of hydrogen gas at 23.0^C and a pressure of 1640 psi?
Consider a chromatogram containing a single analyte with retention time of 4 minutes. The mobile phase elution time is 0.2 minutes. What is the capacity factor (k') for the analyte in question?
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