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If acetic acid is the only acid that vinegar contains Ka = 1.8 x 10^- 5, calculate the concentration of acetic acid in the vinegar. The pH is 3.15.
What mass of oxygen gas would be consumed by the complete combustion of 7.5g of a mixture of propane (C3H8) and butane (C4H10) in the mole ratio of C3H8 / C4H10 = 1.33
The pKa of one of the hydrogens that is attached to one of the nitrogens of the purine guanine is 9.7. If guanine is in a solution that has a pH of 10.2, then what is the net charge of the molecule at this pH. Enter your answer as a decimal to two..
The density of a gaseous compound was found to be 1.23 g L-1 at 330 K and 25.5 kPa. What is the molar mass of the compound?
You are given a 76.0% solution of sulfuric acid, H2SO4. What is the molality of this solution. The density of the H2SO4 solution is 1.278 g/mL.
An electron makes a transition from n = 8 to n = 3. What is the energy associated with this transition
Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.95 M B(aq) with 0.95 M HCl(aq).
You have a gas cylinder, the weights on the piston weight 3kg. The radius of the piston is 40cm. Calculate the pressure of the gas in pascals in atmosphere.
How much free energy is made available by the pH gradient and membrane potential for the transport of protons INTO the cell?
At an altitude of 45.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?
The lower flammability limit (LFL) for a gas is the minimum concentration of the gas, in air, below which there is too little fuel to support combustion.
Verify the following statements (a) One part per million corresponds to one minute in two years, or a single penny in $10,000.
Calculate the pH of 0.103 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10^-3, Ka2 = 6.2 x 10^-8, and Ka3 = 4.8 x 10^-13.
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