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When a 19.7 mL sample of a 0.323 M aqueous hydrofluoric acid solution is titrated with a 0.399 M aqueous potassium hydroxide solution, what is the pH at the midpoint in the titration?
a disinfectant solution is made by dissolving 4.50 g of hydrogen peroxide h2o2 in 143.2 g of water. calculate the mass
consider the unbalanced equation c5h12l o2g --gt co2g h2ol if 25.2 grams of pentane c5h12 are burned in excess oxygen
Analysis of an unknown substance showed that it has high boiling point and is brittle. It is an insulator as a solid but conducts electricity when melted, which of the following substances would have those characterisitics
Determine the standard enthalpy change of the following explosive reaction by using the apprpriate enthalpies of formation
What is the molarity of a sodium chloride solution, if 6.62 g of NaCl are dissolved in enough water to make
benzene and toluene form essentially ideal solutions. a particular mixture that consists of two moles of benzene and
When 7.51 grams of propane reacts with excess oxygen how many grams of carbon dioxide are formed
where a is constant and -infinity
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M, [O2]eq = 4.1 M, [N2O]eq = 3.3 × 10-18 M.
A solution contains 0.200 moles of HCOOH and 0.100 moles of HCOONa in a 200 mL volume is found to have a pH of 3.44. What is the Ka of HCOOH
A 50.0 L steel vessel, filled with CH4 to a pressure of 10.0 atm at 298 K, is heated to 1600 K to convert CH4 into C2H2 . What mass of C2H2can be produced. What pressure does the reactor reach at 1600 K? 2CH4 (g) C2H2(g) + 3H2(g)
A spoon was silver plated electrolytically in a Silver nitrate solution. If 0.750 grams of silver was deposited on the spoon at a constant current of twenty mili amperes, determine how long in hours did the electrolysis take?
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