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At 521 K the value of Kp for the equilibrium represented by the balanced equation is 1.07 x 100. Calculate the value of Kc at the same temperature. Express answer in scientific notation.
Use tabulated thermodynamic data as needed to calculate ΔHf° for the reaction product in the equation shown below if ΔH° for the reaction is -79.46 kJ.
A mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume
A 32.65-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 54.00 mL. The solid and tol
If the initial concentration of {AB} is 0.260 M, and the reaction mixture initially contains no products, what are the concentrations of {A} and {B} after 75 s?
A 3.00-L flask is filled with gaseous ammonia,NH3 . The gas pressure measured at 20.0 deg C is 2.05 atm . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
You need to produce a buffer solution that has a pH of 5.02. You already have a solution that contains 10 rm mmol (millimoles) of acetic acid. H
A graduated cylinder contains 24.0 mL of water. What is the new water level after 38.8 {rm g} of silver metal with a density of 10.5 g/mL is submerged in the water?
A mixture of KBr and NaBr weighing 0.560 gm was treated with aqueous Ag+ and all the bromide ion was recovered as 0.970 gm of pure AgBr. What was the fraction by weight of Kbr in the original sample
A 36.3 ml aliquot of 0.0529 M H2SO4 (aq) is to titrated with 0.0411 M NaOH (aq) What volumen (ml) of base will it take to reack the equivalence point
If a 2.4 reaction vessel initially contains 721 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to drop to below 104?
Given the osmotic pressure of the solution was 1.50 x 10-3 atm and the temperature is 298.0K, calculate the molar mass of the protein.
(a) What is the change in pH when [OH -] increases by a factor of one hundred? (b) What is the change in [H3O+] when the pH decreases by two units?
Using the knowledge of electrochemistry explain why the person who has dental amalgam in their teeth when bites aluminium foil experience momentary sharp pain in their mouth.
2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole. What are the empirical and molecular formulas of ethylene glycol?
A sample of nitrogen occupies 11.2 liters under a pressure of 580 torr at 32?C. What volume would it occupy at 32?C if the pressure were increased to 840 torr? Answer in units of L.
Calculate the heat transferred, Q when 51.0 ml of 2M NaOH solution and 50.0 ml of 2M HCl are mixed. Assume the final volume of the reaction mixture is 101.0 ml.
find the number of moles of water that can be formed if you have 218 moles of hydrogen gas and 104 moles of oxygen gas.
Silver has two isotopes and an average atomic mass of 107.87 amu. If 48.18% of Ag exists as Ag-109 (108.9047 amu), what is the identity of the other isotope?
A sample of vinegar has a freezing point depression of 2.0 degrees C. What is the estimated percent by mass of acetic acid in the vinegar? Molar mass of acetic acid is 60g/mol
What mass of Li2SO4 is formed from mixing 24.5 mL of 1.32 molar LiOH with 10.2 mL of 2.43 molar H2SO4
Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32 P, how many grams will remain after 112 days?
If a 1000 kilogram sample of rock is 0.021% gold by mass. How much zinc is needed to react with the gold extracted from the rock?
What mass of sucrose should be combined with 493 g of water to make a solution with an osmotic pressure of 9.00 atm at 320 K? (Assume the density of the solution to be equal to the density of the so
If O2 is collected over water at 40.0 Celsius and a total pressure of 737 mmHg, what volume of gas will be collected for the complete reaction of 23.92 g of NiO?