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a buffer is made using 45.0 of 0.750 M propanoic acid (Ka=1.3x10^-5) and 55.0 ml of 0.700 sodium propanoate. what is the pH of the buffer. what is the pH after 4.91 ml of 1.00 M sodium hydroxide is added?
calculate the number of excess reagent units remaining when 41 C2H4 molecules and 102 O2 molecules react?
At 295 K, Keq = 7.0 x 10-2 for the following equilibrium: NH4HS(s) ? NH3(g) + H2S(g) What is the equilibrium partial pressure (in atm) of H2S.
C4H10(g) + O2(g) CO2(g) + H2O(g) Consider the above unbalanced equation. What volume of O2 at 555 mm Hg and 56.0°C is required to produce 285 mL of CO2 at 780. mm Hg and 131°C?
The polymerization of styrene to polystyrene can also be catalyzed by benzoyl peroxide. Write the equation for this reaction showing at least three units of the polymer.
Write the systematic (IUPAC, or CA) names for the amines shown below. The names should have the format alkanamine.
A 0.24ml sample of a weak acid with an unknown pKa was combined with 12.0ml of a 3.20M KOH and the resulting was diluted to 1.500L. The measured pH of the solution was 3.75. What is the pKa of the weak acid
What is the conversion calculation for M to grams of KBr for the following: What mass of potassium bromide is contained in 135 mL of 0.251 M Kbr solution
A spoonful of sodium chloride is dissolved in a liter of water. What is sodium chloride in this solution?
Calculate the amount of heat energy in joules required to heat 50.0g of each substance from 25.0 c to 37.0 c
pure (R)-2-Methyl-2-butanol what will your product distribution of R & S alkyl halide be? Explain.
Write a mechanism for the reaction of an alkyl halide with alcoholic silver nitrate which depicts the type of substitution occurs.
Calculate the number-average molecular weight of a random nitrile rubber [poly(acrylonitrile-butadiene) copolymer] in which the fraction of butadiene repeat units is 0.30; assume that this concentration corresponds to a degree of polymerization of..
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