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High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 ) to about 60,000 (60,000,000 ). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 5.17×108 , what is its running pressure in torr? Express the pressure numerically in torr.
A solution is prepared by condensing 4.00L of a gas, measured at 27°C and 746mmHg pressure into 58.0g of benzene. Calculate the freezing point of this solution.
how much heat energy in calories is needed to raise the temperture 10.0g of water 6.0C
write the net ionic equation, a solution of tin II chloride is added to a solution of iron III sulfate
What is the pH of Na3PO4. While this is a triprotic species, you may ignore two of the Ka's and concentrate on the single Ka that is appropriate for this problem.
Draw the molecular orbitals for each geometry, using the 2s orbitals as a basis set. Give the expected ground state for each geometry.
How much water would you add to 50.0mL of 0.400M NaOH if you wanted the final concentration to be 0.200M ?
A graduated cylinder contains 23.5mL of water. What is the new water level after 35.2g of silver metal with a density of 10.5 g/mL is submerged in the water
In the reaction below, 6.76 atm each of Cl2 and I2 were placed into a 1.00 L flask and allowed to react: Cl2(g) + I2(g) 2 ICl(g) Given that Kc = 45.9, calculate the equilibrium pressure of Cl2.
Consider the titration of 44.2mL of 0.240M HF with 0.180 M NaOH . Calculate the at each of the following points. A) How many milliliters of base are required to reach the equivalence point
names of five alkenes having the molecular formula C6H12 that produce hexane on catalytic hydrogenation
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Cu(s) | Cu2+(aq, 0.0032 M) || Cu2+(aq, 4.48 M) | Cu(s)
at 1 atm, how much energy is required to heat 55.0 grams of water at -24.0 degrees Celsius to water at 157.0 degrees Celsius
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