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Methanol, CH3OH, is an efficient fuel with a high octane rating. Combustion of methanol occurs by the reaction:
CH3OH (g) + 3/2 O2 (g) ----> CO2 (g) +2H2O (l) delta H = -76.2 kJ/mol
Calculate the heat evolved when 85.0 g of CH3OH (g) burns (assume excess O2 (g)) and calculate the mass (#grams) of O2 (g) consumed when 500 kJ of heat is produced by this reaction.
The gaseous product of a reaction is collected in a 25.0-L container at 27 degrees C. The pressure in the container is 300.0 kPa and the gas has a mass of 96.0 g. How many moles of the gas are in the container.
show that the function y=y(x) =Asin(kx) satisfies that equation d^2y/dx^2 = -k^2y if A and k are constants. This is an example of a differential equation.
On a cold dry morning after a frost, the temperature was -5C and the partial pressure of water in the atmosphere fell to .30 kPa. Will the frost sublime? What partial pressure of water would ensure that the frost remained?
If a customer replaces a 85 watt bulb with an 20 watt compact fluorescent bulb that lasts 5000 hours, how much less coal (lbs)will be used to generate the electricity that is saved?
Hydrochloric acid reacts with calcium to form hydrogen and calcium chloride. If 100 grams of hydrochloric acid reacts with 100 grams of calcium, what is the limiting reagent
What is the silver ion concentration for a saturated solution of Ag2CO3 if the Ksp for Ag2CO3 is 8.4 x 10^-12
a metal sample weighing 37.6 grams, which has been heated to a temp of 100 degree cin boling water was placed in 48.6g of waterin a calorimeter. The inital temp of the water was 25.2 degree c.
What mass of hydrogen can be produced from 2.90 g of aluminum and 14.0 g of HCl in the above unbalanced reaction?
An aerosol spray can with a volume of 350 mL contains 3.2 g of propane gas (C3H8) as propellant. What is the pressure (in atmospheres) of gas in the can at 65oC?
Calculate the number of moles of oxygen gas produced from the completely catalyzed decomposition of 6.20ml sample of a 3.5% solution of H2O2. The density of the 3.5% solution of H2O2 is 1.01 g/ml.
Determine the cell reaction, the standard cell potential (E0cell) and the half-cell that acts as the cathode for the voltaic cells composed of the following half-cells.
The vapor pressure of acetone is 1 torr at -59, 10 torr at -31, 100 torr at 8, 400 torr at 40, and 760 torr at 56. What is the normal boiling point of acetone
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