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The pH of a certain solution is 4.5. What is the concentration of H+(aq) ions in the solution?
A) 3.16 x 10^-5 MB) 3.16 x 10^4 MC) 4.5 MD) 3.16 x 10^-10 ME) 1.9 x 10^19 M
The next question was this: "What is the PH at it's equivalence point? AS part of your answer, define equivalence point. What does it mean for a substance to be at its equivalence point?"
The first ionization energy of a sodium atom is 0.830 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing sodium atoms
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How many protons, and how many neutrons are present in the nucleus of each isotope? What is the natural abundance of each isotope, if the average atomic mass of gallium is 69.72 u?
Determine how many kgs of Ca are there in a 205-pound man If 1.4 percent of the mass of a human body is calcium(Ca)?
an unknown hydrocarbon with the formula c7h12 reacts with one equivalent of h2 over pd. when the hydrocarbon reacts
atomic absorption spectrometer was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10 uL of a 1000 ug/mL Cd standard was added to 10 mL of solution.
In relation to the oxygen atom forming the linkage between glucose molecules, how are the hydrogens attached to the same carbon
In some industrial processes, sulfite is added to remove dissolved O2 to prevent corrosion of pipes. Write the balanced overall chemical reaction for reduction of dissolved O2 by sulfite (SO32-).
Calculate the pH of a buffer solution that contains 0.10 M NaH2PO4 and 0.50 M Na2HPO4. The Ka of H2PO4- is 6.3 x 10-8 Question options: 1) pH = 7.90 2) pH = 6.50 3) pH = 7.60 4) pH = 6.80
you have two flasks of equal volume. Flask A contains H2 at 0 degree celsius and 1 atm pressure. Flask B contains CO2 gas at 25 degree celsuis and 2 atm pressure. Compare these two gases with respect to each of the following:
The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity.
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