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(a) What is the pH of 100. mL of a buffer solution where the concentration of acetic acid is 0.50 M and the concentration of sodium acetate is 1.0 M? Ka = 1.8 x 10-5 for acetic acid.
(b) If 100. mL of water is added to the 100. mL of buffer solution described in Part a, what is the pH of the resultant solution? Explain.
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of two particles per second. How many years would it take to count 6.25 x 10^23 particles
FInd the definition of cross-linking. How does cross-linking change the properties of a polymers
The addition of H2 to C=C double bonds is an important reaction used in the presentation of margarine from vegetable oils. If 50.0ml of H2 and 50.0ml of ethylene (C2H4) are allowed to react at 1.5atm, the product ethane (C2H6) has a volume of 50.0..
Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic weight of copper to determine the mass of the other copper isotope. Express your answer using four significant figures
what is the oxidizing and reducing agent 3C2H5OH(aq) +2Cr2O7^2-(aq)+16H^+(aq)-->3CH3CO2H(aq)+4Cr^3+(aq)+11H2)(l)
Explain why dichloroethene has a boiling point of 60 degrees C while trans-dichloroethene as a boiling point of 48 degrees C. Include drawings of the structures with dipoles in your answer.
Draw the structural formulas for any three compunds with the molecular formula C4H10O. If its an alcohol, classify each alcohol as primary, secondary, or tertiary?
If a piece of rock that has a volume of 0.73 L and a mass of 1524 g, what is the density of the rock in g/mL?
an aqueous solution contains 12.7 nacl by mass. what mass of water in gramsis contained in 2.5l of the vapor above this
Organelles compartmentalize a cell like a department store displays similar items together. What advantage does such compartmentalization offer a large cell and what are two examples of oraganelles and the activities they compartmentalize?
Diethyl ether has a H°vap of 29.1 kJ/mol and a vapor pressure of 0.703 atm at 25.0°C. What is its vapor pressure at 85.0°C?
The flask contains 10.0ml of HCL and a few drops of phenolphthalein indicator. The buret contains 0.270 M Naoh. What volume of Naoh is needed to reach the end point of titration. What was the initial concentration of HCl
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