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3.06 grams of hydrogen is allowed to react with an excess of O2 gas to form 27.35g of H2O. In a second experiment, I(electric current) broke down a sample of H2O into 1.45 grams of hydrogen and 11.51 grams oxygen. Are these results reliable with the law of exact extent?
aliquot of 0.0529 m H2SO4 (aq) is to be titrated with 0.0411 m NaOH (aq). What Volume (mL) of base will it take to reach the equivalence point?
Consider a mixture is a 2 dm^3 flask at 27 degree C. For each of the following mixtures, calculate the partial pressure of each gas, the total pressure, and the compositon of the mixture in mole percent. (Hint: for mole percent take your answer fo..
calculate the mass of the sodium. The vapor pressure of water is 23.8 mm Hg at 25.0°C. Use molar masses with at least as many significant digits as the data given.
What is the pH if 100 mL of 1.00M NaOH is added to the buffer into 30.0 grams of solid NaF is placed in 1.00 liter of a 1.00M HF solution for Ha, Ka=6.8x10-4
Calculate the freezing point depression constant (Kf) of phenol ? c)If 24.5899g of unknown was added to 838.72g of phenol to prepare the solution, calculate the molar mass (MM) of the unknown.
The acid dissociation constant for hypochlorous acid (HClO) is 3.0x10-8. Calculate the concentrations of H3O+, ClO- and HClO at equilibrium if the initial concentration of the acid is 0.05 M. What is the pH? I made an ice table and found x to be 3..
A car averages 45.00 miles per gallon of gas. How many kilometers can it travel on 10.0 liters of fuel
Find q of a reaction. A cup calorimeter contains 50.0 mL of 0.500 M NaOH at 25C. Then 25.0 mL of .500 M HCl at 25 C is added. After reaction, the final temperature = 27.21 C. What is q in KJ. Given C=4.184 J/gK
Choose the solvent below that would show the greatest boiling point elevation when used to make a .10 m nonelectrolyte solutiona)CCl4, Kb=29.9 degree C/m
Draw all of the eclipsed and staggered conformations for the c3-c4 bond in hexane starting with the conformation that has the lowest energy.
Heating potassium chlorate KClO3, yields oxygen gas and potassium chloride. What volume, in liters, of oxygen at 23 degrees C and 760 torr is produced by the decomposition of 4.42 g potassium chlorate
What is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 Torr at 25C vapor pressures at 25 C= pure pentane is equal to 511 torr, pure hexane equals 150 torr.
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