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A buffer solution consists of 1.5 mol/L of sodium acetate and 1.5 mol/L of acetic acid. The Ka of acetic acid is 1.8x10^-5. What's the pH of the buffer?
A graduated cylinder contains 24.7 ml of water. After adding 32.56 grams of a solid the volume reading of the cylinder reads 38.9 ml. The numerical value of the density (assuming proper units) of the metal is
Compute the molar mass of vitamin C if a solution of 22.7 g in 100. g of water freezes at -2.40 oC. The Kf of water is 1.858 oC kg/mol.
This compound, C5H10, gives a negative test for C-C double bonds and gives only one monobromo substitution product, C5H9Br. Propose a structure for this compound
Oxalic acid is a diprotic acid that occurs naturally in some plants. Calculate the pH and the concentrations of all species present in a 0.36-M solution.
If it takes 4.67 times as long for a particular gas to effuse as it takes hydrogen under the same conditions, what is the molecular mass of the gas?
Calculate the entropy change. What would be the value of S if the heating were carried out irreversibly?
A sample of H2O with a mass of 46.0 grams has a temperature of -58.0C. How many joules of energy are necessary to melt 46.0 grams of ice.
Would entropy for a gas be heat Irreverisibly be greater than, less than or equal to a gas heated reversibly? Explain
a sample of helium gas initially at 37 degrees celsius 785 torr and 2.00l was heated to 58.0 degrees celcius while the
How to calculate the ratio of the masses of the buffer components required to make the buffer? m(NH3) / m(NH4Cl) ph= 9.00
a sample of KHC2O4 weighing 0.717g was dissolved in water and titrated with 23.47 mL of an NaOH solution. caluculate the molarity of the NaOH solution.
The reactant concentration in a zero-order reaction was 0.100 M after 115 s and 2.50×10-2 M after 350 s. What is the rate constant for this reaction. what is the initial concentration for this reaction. k=3.19*10 -4
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