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How much heat (in kJ) is evolved in converting 1.00 mol of steam at 160.0 degrees Celcius to ice at -45.0 C? The heat capacity of steam is 2.01 J/g and of ice is 2.09 J/g.
A balloon is partly inflated with 480 liters of helium at sea level where the atmospheric pressure is 996 mbar.The balloon ascends to a altitude of 3000 meters.
Balance the following molecular equations for these reactions. Write the ionic equation for the reactions. Write the net ionic equation for the reactions.
If 4.00 mol of calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2), a gas used in welding, will be produced.
For one of the solutions you make up for this week's experiment, 8.00 mL of 2.0E-3 M iron(III) nitrate solution is mixed with 1.00 mL of 2.0E-3 M potassium thiocyanate solution,
The compression ratio of today's cars is so much higher than in cars of years past. What is the major advantage of increasing the compression ratio?
Calculate the concentrations of all species in a 0.750 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
A sample of calcium carbonate absorbs 45.5 J of heat upon which the temperature of the sample increases from 21.1 degrees celcius to 28.5 degrees celcius.
Which of the following is a statement of Hess's Law? Answer a. If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps
How many L of O2 gas at STP, are needed to react with 15.0 g of Na using the following chemical reaction: 2Na(s) + O2(g) => 2NaO(s)?
Important information about AP Chemistry a. S(2)O(3)^2- (aq)+I(3)^- (aq) ->S(4)O(6)^2- (aq) + I^- (aq) b. Mn^2+(aq) + HBiO(3) (s) ->MnO(4)^- (aq) + Bio^+ (aq) (acid)
In the event of a severe and prolonged shortage of petroleum, suggest one alternative fuel that could be used for automobiles. What do you see as the advantages and disadvantages of your choice of alternative fuel?
175g of water was heated from 15c to 88c. how many calories were absorbed by the water
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