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What is the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2? The Ka for acetic acid is 1.8 x 10-5.
how many grams of vinegar are required to react completely with 25.0g of baking soda.
Use of fossil fuels - Should we be burning the raw materials for medicine and polymers? Where will we be in 50 years on this issue?
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol.
In the laboratory, a student named Georgia weighed 5.05 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand.
Suppose that 25 g of each of the following substances is initially at 28.0degrees C. What is the final temperature of each of the following substances upon absorbing 2.35 kJ of heat.
A 4.63 g sample of a molecular compound is dissolved in 103 g of tetrachloromethane (carbon tetrachloride). The normal boiling point of the solution is 61.51?C.
An aqueous solution contains 167 g CuSO4 in 820 mL of solution. Calculate the : a. Molarity b. Percent by mass c. Mole fraction d. Molality of the solution, The density of the solution is 1.195 g/mL
What is the composition in mole fractions of a solution of benzene and toluene that has a vapor pressure of 35 torr at 20 °C? Assume the mixture forms an ideal solution.
A white solid remains in centrifuge tube after acetone extraction-it fizzes when hydrochloric acid is added suggesting sodium carbonate was formed- How did it form? Write a balanced equation for the formation?
You are given a worked wooden item from an archaeological dig believed to date to during the last glaciation. As such, the artifact would be another piece of evidence.
Determine at what minimum angle relative to the centerline perpendicular to the doorway can someone outside the room hear no sound?
The annual production of zinc sulfide (ZnS) is 3.5 10^4 tons. Estimate the number of tons of SO2 produced by roasting it to extract zinc metal.
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