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0.4 grams sample of primary standard Na2CO3 treated with 45mL of dilute perchloric acid. Solution boiled to remove CO2 and then the excess HClO4 back titrated with 13mL of dilute NaOH. In a seperate experiment 18.44 mL of HClO4 neutralized NaOH in a 16.0 mL portion. Calculate molarities of HClO4 and NaOH
anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
What is the concentration of a saturated calcium carbonate solution?
How is the half-life of a first-order reaction effected by the concentrations of the reactants?
What is the freezing point of a solution of 5.00 g of benzophenone (C13H10O) in 100 mL of benzene (benzene density = .887 b/mL). Pure benzene has a melting point of 5.50 C and the Kf of benzene is 5.12 C/m
Based on the sign of E°cell, classify these reactions as spontaneous or nonspontaneous as written. Assume standard conditions. Au3+(aq) + 3Ag(s) -----> Au(s) + 3Ag+(aq)c
How many centimeters does light travel in 5.00 years (given that the velocity of light is 3.00 \times 10^{10} {\rm cm}/{\rm s})? Express your answer with the appropriate units.
The Kb of methylamine, CH3NH2, is 4.2 x 10-4. Calculate the pH of a solution of 0.431 M methylamine.
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
At a certain temperature, reaction has equilibrium constant (Kc) of 1.9 x10^19. Determine the equlibrium constant for the reaction based on this information at the same temperature.
A 51.0-mL volume of AgNO3 solution contains 0.0273 mol AgNO3 (silver nitrate). What is the molarity of the solution.
what is the total number of joules of heat energy absorbed when the temperature if 200.0g of water is raised from 10 degrees celcius to 40 degrees celcius.
What volume (mL) of hydrogen gas, saturated with water vapor, will be obtained from a 0.1138 gram sample of alloy which is 73.2% aluminum? (Pbar= 754.3 torr, Temp= 21.2 Celsius)
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