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Calculate the pH of a 7.40×10^-1 M aqueous solution of sodium fluoride (NaF). (For hydrofluoric acid, HF, Ka = 7.20×10^-4) Give two decimal places in your answer
What is the mass (in grams) of the precipitate when 8.05 g of barium nitrate reacts in solution with excess sodium carbonate
A gas mixture composed of helium and argon has a density of 0.727g/L at a 755mmHg and 298K .What is the composition of the mixture by volume?
A chemist adds 295.0mL of a 0.071M potassium permanganate (KMnO4) solution to a reaction flask. Calculate the mass in milligrams of potassium permanganate the chemist added to the flask.
The stack gas contains C02 at a partial pressure of 80 mm Hg and no CO,O2, methane or ethane. Calculate the mole fraction of methane in the fuel and the dew point temperature of the stack gas.
Calculate the value of w (work) for the following system if 29.0 g of NaN3 reacts completely at 1.00 atm and 22 °C.
what is the temperature of the air inside of the tire when the pressure increases to 29 psi? Assume tire volume is constant.
A solution is 40.0% by volume benzene (C6H6) in carbon tetrachloride at 20C. The vapor pressure of pure benzene at this temperature is 74.61 mmHg and its density is 0.87865 g/cm3
identify the stronger acid in each of the following pairs a)NH4^+ or H3O^+ b)H2SO4 or HCN c)H2O or H2CO3
The isomerization of cyclopropane to form propene is a first-order reaction. At 760 K, 85% of a sample of cyclopropane changes to propene in 79.0 min. Determine the rate constant for this reaction at 760 K
what is the Na+ ion concentration in the solution by mixing 20 mL of .10 M Na2SO4 solution with 50 mL of .30 M Na3PO4?
A sample of vapor has the composition 50% A and 50% B. What is the composition of the boiling liquid that produced this vapor
Estimate the concentration of KCL solution at 298K, if the vapor pressure of pure water is 23.76 mmHg and that of KCL solution is 22.98 mmHg
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