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A researcher is often required to prepare solutions in the lab. Typically, a lab provides a concentrated solution. This solution must be diluted to the proper concentration. Hydrochloric acid is a common stock solution that is typically purchased at 37.0% HCl concentration (density = 1.20 g/ml). You must make 100 ml of 0.25 M HCl to do a DNA extraction experiment. How much of the 37.0% HCl concentration stock do you need to prepare this solution?
An inert gas occupies volume of 366 ml at temperature 41 oC and pressure 354 Torr. What volume does the gas occupy at standard ambient temperature and pressure (SATP)?
Consider the reaction 2ZnS + 3O2 → 2ZnO + 2SO2. Suppose that you wanted enough O2 to completely react with 500. g of ZnS.
When the electron cloud of a molecule is easily distorted, the molecule has a high ?
A system expands in volume from 2.0 L to 24.5 L at constant temperature. Calculate the work (w) if the expansion occurs against a constant pressure of 5.00 atm.
Some solid remained in the beaker after stirring with HCl. You washed the filter paper with ketone, which caught on fire and the filter paper was scorched
Calculate the change in chemical potential of the 12g of carbon dioxide after being completely released from the cartridge at room temperature.
Solution A contains 29.541 millimoles of 0.09847 M of acetic acid (HOAc) and 34.51 millimoles of 1.0 M of sodium acetate (NaOAc). Solution B is made by 10 mL of Solution A + 90 mL of boiled water.
How many grams of cholesterol are in 230 mL of blood? The concentration of cholesterol (C_27H_46O) in blood is approximately 5.0mM.
A galvanic cell has an iron electrode in contact with 0.11 M FeSO4 and a copper electrode in contact with a CuSO4 solution.
Calculate the mass of air in an air-filled tire. Part B: Calculate the mass of helium in a helium-filled tire. Part C: What is the mass difference between the two?
Determine the molarity of a solution made by dissolving 20.0 g of NaOH in sufficient water to yield 436 mL of solution.
How much energy is required to boil 45.5g of water at 100 degrees C at sea level? The molar heat of vaporization of water is 40.6 kJ/mol.
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