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What is the [H3O+] in a buffer that consists of 0.30 M HCOOH and 0.20 M HCOONa? Ka=1.7x10^-4
A buffer solution contains 0.15 mol of propionic acid (C2H5COOH) and 0.28 mol of sodium propionate (C2H5COONa) in 1.50 L. 1.) What is the pH of this buffer?
Calculate the number of oxygen molecules per liter of air if the temperature and pressure were 25°C and 1.00 atm, respectively.
What is the mass of a piece of aluminum if it required 857 J of energy to raise the temperature by 34.5 degrees C?
A graduated cylinder contains 18.0 m/L of water. What is the new water level after 35.6 g of silver metal with a density of 10.5 g/mL,is submerged in the water?
You are told to prepare a Ammonium buffer solution (0.15M, pH 8.5; 1.0L). You have HCl (0.15M); Ammonia (NH3) and Ammonium chloride (NH4Cl); solid 100g) (Kb for NH3 = 1.8 x 10-5). Please show how you are going to prepare this solution.
A gaseous mixture containing 0.150 mol fraction of carbon tetrachloride (CCl4) and 0.850 mol fraction of dry air is initially at 65.0°C and 1121 mmHg
Calculate the minimum concentration of Mg2+ that must be added to 0.10 M NaF in order to initiate a precipitate of magnesium fluoride. (For MgF2, Ksp = 6.9 ? 10-9.)
A solution of 0.1% sodium dodycl sulfate (SDS) binds so strongly to polypetide chains that one detergent molecule is sufficient to saturate two amino acid residues.
Calculate the amount of heat needed to boil benzene (C6H6), beginning from a temperature of 6.7 degrees celcius.
What is the lewis structure for HIO3, including lone pairs. Assign formal charges. If a more equally stable resonance exists, draw it(them).
the total volume of the gas bags of the german dirigible hindenberg, was 2.0 * 10^5m^3. how many grams of H2 would be required to fill them at 20 celcius and 1.00 atm pressure? hint convert m^3>cm^3>mL>L.
Explain the meaning of the term condensation reaction in organic chemistry. 3.) explain how you would show experimentally that 2 particular organic compounds were optical isomers of each other.
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