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A 9.767-g gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen. Calculate the mass percent of ethane in the original mixture.
How many grams of dry NH4Cl need to be added to 1.80 L of a 0.800 solution of ammonia, NH3, to prepare a buffer solution that has a Kb of 8.87? for ammonia is 1.8E-5.
Draw all possible isomers for the molecule having the formula C7H7C1. The molecule contains one benzene ring.
If a reaction mixture initially contains 443 of and 391 of , what is the mole fraction of when equilibrium is reached.
The resulting solution freezes at 26.5 oC. If Kf for the solvent is 1.74 o C/m then determine the molar mass of the nonelectrolyte compound?
A canister is filled with 320 of ice and 100. of liquid water, both at 0 . The canister is placed in an oven until all the has boiled off and the canister is empty.
How much energy is required to boil 45.5g of water at 100 degrees C at sea level? The molar heat of vaporization of water is 40.6 kJ/mol.
A compressed air tank carried by scuba divers has a volume of 9.5 L and a pressure of 130 atm at 20 C. What is the volume of air in the tank (in liters) at STP?
What mass of Aluminum is produced when 0.5 mole of Al2S3 is completely reduced with excess H2?
A sample of steam with a mass of 0.550grams and at a temperature of 100 degrees celcius condenses into an insulated container holding 4.30grams of water at 6.0 celcius
Organic Oxygen Compounds, What are the possible isomers for Methanol, 1-Propanol, & 1-Pentanol?
How many grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution containing chromium(III) sulfate for 45.0 minutes.
A sample of gas inside a 150 mL piston has an initial temperature of 550 K and pressure of 8.0 atm. As the piston expands to 650 mL, the pressure decreases to 1.5 atm.
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