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For each of the following, write chemical equations showing how an aqueous solution containing the indicated solutes in comparable concentrations can act as a buffer solution.
(a) HNO2 and Mg(NO2)2
(b) K2SO3 and NaHSO3
(c) HN(CH3)3Cl and N(CH3)3
(d) Na2H2P2O7 and Na3HP2O7
If the annual production of acetyl salicylic acid in the U.S.A were converted to 5-grain aspirin tablets, approximately how many tablets would there be for each person? Assume that the population is about 3.0 X 10 ^8. Show Calculation
fifty mililiters of 1.00m hno3 was added to 50.5 ml of 1.00m of naoh solution. calculate the mass of the reaction
Which of the following substances has a standard heat of formation of zero? A. pb @ 1000 degrees C B. C3H8 @ 25.0 C and 1 ATM pressure C.
The student next added 3M KOH solution to the aqueous solution and Mg(OH)2 precipitated. After filtering the solution and drying the precipitate, the student recovered 1.10g of Mg(OH)2. Calculate the percent Mg(OH)2 in the mixture
Describe in detail how you would prepare a solution with a concentration near 0.100 M from a 0.650 M stock solution. Calculate the final concentration of the diluted solution (it won't be exactly 0.100 M). It should be within 10% of 0.100 M.
Calculate Delta G and Delta A for the vaporization of 1.00 mol H2O at 1.00 atm and 100 ?C. Consider the process reversible. The density of H2O(l) at 100 ?C and 1 atm is 0.958 g/cm3.
Suppose the current flowing from a battery is used to electroplate an object with silver. Calculate the mass (in grams) of silver the would be deposited by a battery that delivers 1.25 A/hr of charge.
How much thermal energy is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 19.50 degrees C to 38.83 degrees C. The calorimeter has a heat capacity of 650 J/degrees C and the calorimeter c..
The binding of the first O2 to this hemoglobin increases the affinity for the binding of the second O2. C. The binding of the first O2 to this hemoglobin decreases the affinity for the binding of the second O2. D. The binding of the first O2 to th..
A sample of white gold is 18.0 grams gold, 3.0 grams silver, 2.0 grams cobalt, and 1.0 gram platinum by mass. What is the percent of platinum in the sample
If your reaction vial is wet with water when you start the nitration reaction of methyl benzoate, there may be no solid product formed at the end when you pour the reaction mixture into water. Considering the mechanism of the reaction why does the..
A reaction has a rate constant of 0.0591 sec-1, how much of the compound (in mol/L) is left after 5.03 sec, if there was 0.770 mol/L at the start
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