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If 1.60 mol of CS2 burns with 5.60 mol of O2, how many moles of the excess reactant will still be present when the reaction is over?
The partial pressure of O2 in air at sea level is 0.21 atm. Using Henry's law, calculate the molar concentration of O2 in the surface water of a mountain lake saturated with air at 20C and an atmos
When separated from a water solution,CuSO4 forms a hydrate with 5 water molecules per formula unit. If 45 g of anhydrous CuSO4 are dissolved in water, what mass of the hydrate could be recovered fro
A solution is prepared by dissolving 197 g sucrose (C12H22O11) in enough water to produce 1.20 L solution. What is the molarity of this solution?
A student was given 45 mL of ethanol. It has a density of o.789 g/mL. This amount of ethanol was placed into 969 mL of water to make a solution. What is the mass percent of ethanol in water?
basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
C2H4(g) + O2(g) CO2(g) + H2O(g). How many moles of O2 would be required to react with 0.640 moles of C2H4 in the above unbalanced reaction?
What is the percent yield of a reaction in which 248 g phosphorus trichloride reacts with excess water to form 126 g HCl and aqueous phosphorus acid (H3PO3)?
If 69.5 kJ of heat is applied to a 1034 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
Calculate the equilibrium concentrations of H2O, CO2, and H2 in a reaction mixture obtained by heating 6.00 of steam and an excess of solid carbon in a 4.25 container.
An equilibrium mixture of O2, SO2, and SO3 contains equal concentration of SO2 and SO3. Calculate the concentration of O2 if Kc =280 for the reaction.
A solution is prepared by dissolving 285 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
A mixture of 0.0319 g hydrogen and 0.0178 mol oxygen in a closed container is sparked to initiate a reaction. How many grams of water can form?
How many milliliters of the commercial acid does the chemist require to make up a 1.5 liter solution of the dilute acid?
An unknown gas sample was dissolved in water at 25°C, producing a solution with a concentration of 4.7 x 10-4 M at 522 mm Hg. What is the Henry's law constant for the unknown gas
The temperature of a lead fishing weight rises from 15 oC to 45 oC as it absorbs 22.5 kJ of heat. What is the mass of the fishing weight in grams? Heat capacity of lead is 0.128 J/g oC.
What is the volume of the gas in milliliters when the pressure and temperature of the gas sample are changed to 634 and 301 ?
No crystals form on cooling, and so the student pours out the solution and starts the experiment over. Have the carbon, hydrogen, nitrogen, and oxygen atoms of the acetaminophen been destroyed?
What is the numerical value for the equilibrium constant for this reaction:
What is numerical value of the equilibrium constant for the reverse reaction?
At 25 degrees Celsius the first-order rate constant for a reaction is 2.0x10^3 s^-1. the activation energy is 15.0 kJ/mol. what is the value of teh rate constant at 75 degrees Celsius?
What is the molarity of the OH- ions in 0.040 M barium hydroxide, Ba(OH)2? I know the answer is .08M. The barium hydroxide is fully dissociated into ions in the dilute solution.
What mass of magnesium, in reaction with hydrochloric acid, is needed to produce 128 mL of hydrogen (H2) gas? The H2 gas is collected over water at a temp. of 25 C.
In an equilibrium mixture of the three gases, the partial pressures of SO2Cl2 and SO2 are 3.31 atm and 1.59 atm, respectively. What is the partial pressure of Cl2 in the equilibrium mixture?
Calculate the amount of heat required to completely sublime 20.0 g of solid dry ice {rm{(CO}}_2 ) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 {{rm{kJ}}}/{{rm{m