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what is the [H3O+] and the pH of a benzoic acid-benzoic buffer that consists of 0.15 M C6H5COOH and .47 M C6H5COONa? (Ka of benzoic acid = 6.3 * 10^-5)
determine the mass of lithium hydroxide produced when 0.38 grams of lithium nitride reacts with water according to the following unbalanced chemical equation
Na3PO4+CaCl2 ---> Ca3(PO4)2+NaCl if 0.996 g of Na3PO4 are provided, how many grams of Ca3(PO4)2 should be formed?
A solution is 21.0% ethylene glycol (C2H6O2) solution in water with density of 1.02g/mL. WHat is the molarity?
The pH of the resulting solution is 6.35. Calculate the Ka for the acid.
What mass of P4 is produced when 41.5 g of Ca3(PO4)2, 26.5 g of SiO2 and 7.80 g of C are reacted according to the equation: 2Ca3(PO4)2 + 6SiO2 + 10C ¼ P4 + 6CaSiO3 + 10C
Calculate the wavelength, in naniometers, of the spectral line produced when an electron in a hydrogen atom undergoes
What is the pH at the stoichiometric point? What is the pH when 105% of the base required to reach the stoichiometric point has been added?
Calculate the molar solubility of Fe(OH)2 in a buffer solution where the pH has been fixed at the indicated values. Ksp = 7.9 x 10-16 , Ph=7.5
What are the equilibrium partial pressures of CO(g) and CO2(g) when 2.32 atm CO(g) and excess FeO(s) react in a sealed container at 1000°C? PCO atm PCO2 atm
A basketball is inflated to a pressure of 1.50 atm in a 20.0°C garage. What is the pressure of the basketball outside where the temperature is -5.00°C?
The equilibrium constant, Kc, for the following reaction is 7.00E-5 at 673 k. Calculate Kp for this reaction at this temperature.
If 0.628 moles of a substance weighs 77.3 g, what is the molar mass of the substance, in units of g/mol?
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