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A compound is found to contain 49.5% carbon, 5.19% hydrogen, 16.5% oxygen, and 28.9% nitrogen. Its molecular mass is 194.2 g/mol. What is its empirical formula? What is its molecular formula? Explain what each of these formulas tells us about the molecule.
A solution of 0.0385 M hypochlorous acid, HOCl, has a pH of 4.47. Calculate the acid dissociation constant Ka.
when a particular marble is dropped into a beaker of water it sinks to the bottom. which is the best explanation? a.
The pH of a 0.02M solution of a weak acid was measured to be 4.6. What is the [H+] in the solution? Calculate the Ka and pKa for this acid.
The density of osmium is 22.57g/cm^3 what volume will be occupied by 4.06 kg of osmium
Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (\rm nm), where 1\;{\rm nm}= 10^{-9}\;{\rm m}. What is the energy of the X-rays
A buffer solution is made that is 0.378 M in HClO and 0.378 M in KClO. (1) If Ka for HClO is 3.5E-8, what is the pH of the buffer solution. (2) Write the net ionic equation for the reaction that occurs when 0.082 mol KOH is added to 1.00 L of the ..
What will be the concentration for the first ion that precipitates when the second, more soluble salt begins to precipitate
For each of the following processes, indicate whether the signs of S and H are expected to be positive, negative, or about zero.
Using the equilibrium constant given for the reaction below, calculate the equilibrium constant for the following reaction: 3SO3(g) + 3NO(g) = 3SO2(g) + 3NO2(g) Kc=?
A 0.040 M solution of a monoprotic acid is 14 percent ionized. Calculate the ionization constant of the acid.
Calculate the amount of 10.00% acetic acid you will need to add to 100.0 mL of your milk in order to bring the final acidity to 1.00% acetic acid.
Determine How many moles each of Na+ and Cl- are in 0.800 L A physiological saline solution contains 172mEq/ L each of Na+ and Cl-of the saline solution?
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