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What volume and mass of steam at 100 degress celsius and 1.00 atm would release the same amount of energy during condensation as 100. cm ^3 of liquid water would release during freezing?
An aerosol can has a gas pressure of 144 kPa at 293 K. Calculate the pressure when the can is heated to 425 K.
Draw the orbital-energy diagrams and use the spectrochemical series to show orbital occupancy and identify ehether the complexes are diamagnetic or paramagnetic.
A large weather balloon filled with helium as a volume of 7.00 x 102 L at STP. Which expression should be used to find the mass of helium in the balloon?
3.60 bar of NO2 (g) is initially placed in a 1.00 L container. At equilibrium, the total pressure is found to be 4.4 bar. What is the value of Kp under these conditions?
In a reaction at equilibrium the partial presssure of SO2 is 117 torr and that of Cl2 is 255 torr. What is the partial pressure of SO2Cl2 in this mixture?
What mass of sucrose should be combined with 537 of water to make a solution with an osmotic pressure of 8.55 at 275 ?
Consider the titration of 50.0 mL of 0.217 M hydrazoic acid (HN3, Ka = 2.6 x 10-5) with 0.183 M NaOH. Calculate the pH of the solution after addition of 29.7 mL of NaOH solution.
Prepares a mixture of 0.675 M SCl2 and 0.973 M C2H4 and allows it to react at room temperature (20.0 ºC). At equilibrium the concentration of mustard gas at equilibrium is 0.350 M. Calculate Kc
The standard enthalpy of combustion of ethene gas [C2H4] is -1411.1 kJ/mol at 298 K. Given the following enthalpies of formation, calculate delta Hf (final enthalpy) for C2H4.
When a 24.8-g sample of ethyl alcohol (molar mass = 46.07 g/mol) is burned, how much energy is released as heat?
How many grams of water will be produced? What is the limiting reagent? (Be sure to balance equation for this reaction).
During the titration several milliliters of deionized water are added to the Erlenmeyer flask containing the KHP solution. How will this affect the calculated concentration of NaOH (too high, too lo
At a temperature T, a previously empty 5.00L flask is prepared by adding 1.20 mol SO2 and 1.5 mol of O2. Determine the concentrations of SO2, O2 and SO3 once equilibrium is established. KC=963,
An auto mechanic spills 78. mL of 2.5 M H2SO4 solution from a rebuilt auto battery. How many milliliters of 1.3 M NaHCO3 must be poured on the spill to react completely with the sulfuric acid?
The rate constant for a certain reaction is = 3.40×10-3 . If the initial reactant concentration was 0.750 , what will the concentration be after 6.00 minutes?
Calculate the pH at the equivalence point for the titration of 0.20 M aniline (C6H5NH2, Kb = 3.8 x 10-10) with 0.20 M HCl. [Hint: remember the dilution factor caused by addition of titrant to the an
After equilibrium was reached, the total pressure was 0.836 atm and the partial pressure of oxygen was 0.0275 atm. Calculate Kp for each of these reactions.
calculate the wavelength of the photon emitted when an electron drops from 4d obital to a 2p orbital in a hydrogen atom using Rydberg constant as 1.097 x 10-2pm-1
A sample of hydrogen occupies a volume of 1.20 liters at a pressure of 425 kilapascals. If the temperature of the gas is constant, what would the new volume of the gas be at 615 kilapascals?
Assume that the activation energy for a certain reaction is 173 kJ/mol and the reaction is started with equal initial concentrations of reactants.
A student mixed 5.00 mL of a nickel(2) chloride solution with 5.00 mL of .100M sodium phosphate and a precipitate formed. How many moles of sodium phospahte were present in 5.00 mL of the solution?
Iron ore is produced through the following reaction in a blast furnace. If 4.00kg of iron(III) oxide reacts, how many moles of carbon monoxide are needed?
after 50 g of certain substance is heated in air until no further reaction occurs, 39.9 g of metal is left. is the reactant an element or a compound? explain
How many grams of oxygen are collected in a reaction where 222 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?