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Complete combustion of 8.60g of a hydrocarbon produced 26.4g of CO2 and 12.6 g of H2O. What is the emperical formula for the hydrocarbon?
For the diprotic weak acid H2A, Ka1 = 3.2 × 10-5 and Ka2 = 7.9 × 10-7. What is the pH of a 0.0400 M solution of H2A? What are the equilibrium concentrations of H2A and A2- in this solution
Calculate the pH of a solution that results from mixing 19.8 mL of 0.120 M acetic acid with 20.0 mL of 0.178 M sodium acetate. The Ka value for CH3COOH is 1.8 x 10-5.
If a solution contains 0.60 mol of OH^-, how many moles of H^+ would be required to reach the equivalence point in a titration. Express your answer using two significant figures.
What is the concentration of vinegar in moles per liter of solution (molarity, M)?
What is the energy required to change a spherical drop of water with a diameter of 1.40 mm to two smaller spherical drops of equal size?
Using the Boltzmann distribution given below, determine Jmax (quantum number of the most intensely populated rotational state) as a function of temperature. Then find Jmax for CN+ at 298 K and 1100 K.
Calculate the molarity of S2O32- if 3.0 mL 0.10 M K2S2O8, 2.0 mL 0.10 M K2SO4, 1.0 mL 2% starch, 2.0 mL 0.010 M Na2S2O3, and 5.0 mL 0.20 M KI are mixed.
15.0 grams of an unknown sugar was dissolved in water and the final volume of the solution was brought up to 1.00 L. The osmotic pressure of this solution was determined to be 2.44 atm at 25°C. Which of the sugars below was most likely the unknown..
The d-d transition in [Ti(H2O)6]3+(aq) produces an absoption maximum at 500 nm. What is the magnitude of DELTA for this complex in kJ/mol?
In a titration, 10.0 mL of 0.025 M hydrochloric acid is added to 30.0 mL of 0.030 M ammonia. What is the pH of the resulting mixture?
1) Many household cleaning products contain oxalic acid H2C2O4, , a diprotic acid with the following dissociation constants: Ka1=5.9E-2 and Ka2=6.4E-5 Calculate the equilibrium concentration of C2O4^2- in a 0.20 M solution of oxalic acid
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
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