Determine the total number of moles of oxygen
given the balanced equation representing a reacction:
2C2H6+7O2=4CO2+6H2O
determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6.
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Calculate the expected pH of a 25.0 ml solution of 0.200 M acetic acid that is being titrated with a 0.100 M solution of NaOH at any point in the region II of the titration. (Ka of CH3COOH = 1.8 x 10^-5)
A compound is 40.0% C, 6.70% H, and 53.3% O by mass. Assume that we have a 100.- g sample of this compound. What are the subscripts in the empirical formula of this compound?
A solution is made by dissolving 26.42g of (NH4)2SO4 in enough H2O to make 50.00mL of solution. What is the molar mass of (NH4)2SO4?
A metal container holding xenon gas (Xe) has a pressure of 458 torr at 20 degrees celcius. At what temperature will the pressure be 1.00atm?
A graduated cylinder contains 138 of water. A 12.0 piece of iron (density = 7.86 ) and a 22.0 piece of lead are added. What is the new water level in the cylinder?
An unknown sample of N2+ gave a current of 2.36µA in an electrochemical analysis. When 0.500 mL of solution containing 0.0287M N2+ was added to 25.0 mL of unknown, the current increased to 3.79 µA.
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