March 26, 2017

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Number of results: 9

college chemistry2
calculate the molarity of a solution containing 20.0g of sulfuric acid in 500 ml of solution?in a solving problem form?
August 5, 2012 by raymond benzon

if 160g of Al reacts with O2 to produce 260g of Al2O3.calculate the theoretical yield and the percent yield 4Al+3O2 2Al2 O3
May 5, 2010 by chris

College Chemistry2
A solutionof 2.50g of a compound having the empirical formula C7H6O2 in 25.0g of benzene is observed to freeze at 4.3 degree C.Calculate the molar mass of the solute and its Molecular formula
February 5, 2011 by Anonymous

Hydrochloric acid is sold as a concentrated acqueous solution. If the molarity of HCl is 12.0 and its density is 1.18 g/ml. calculate A) MOLALITY B)THE % BY MASS OF HCl in the solution
May 11, 2011 by Daniel Forero

A student pours 200 grams of methanol, a flammable substance into the sink. Another student causes the bad situation to get evern worse by dropping a lit match into the sink. The methanol burns completely with 300 grams of oxygen from the air. What mass, in grams, is converted...
September 9, 2015 by Sam

Physical Chemistry2
One mole of a van der Waals gas with a=15.0 l^2 atm mol^−2 and b=0.015 l mol^−1 is expanded reversibly and isothermally from 1 atm to 0.5 atm at a temperature of 300 K. Calculate w for this process, and compare it with that required to expand an ideal gas between ...
September 29, 2008 by Amber

An electrochemical cell is created using gold and magnesium half-cells. a. Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell. You do not need to diagram the cell. b. If the mass...
November 27, 2010 by Adam

WO3 (s) + 3 H2 (g) -> W (s) + 3 H20 (g) Tungsten is obtained commercially by the reduction of WO3 with hydrogen according to the equation above. The following data related to this reaction are available. DeltaH(kilojoules/mole) for WO3 is -839.5. DeltaH for H20(g) is -241.6...
November 30, 2010 by Jeffery

12.) Chlorine reacts with potassium bromide to produce potassium chloride and bromine. a.) write a chemical equation, using words, to represent the above chemical reaction. Answer: Chlorine + potassium bromide ==> potassium chloride + bromine (Is this correct?) b) Suppose 4...
September 9, 2015 by Sam

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