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The equilibrium constant for the reaction 2HI(g) = I2(g) = H2(g) is K = 0.11. What is the equilibrium concentration of ICl(g) if the equilibrium concentrations of I2 (g) and H2(g) are both 0.075 M?
Calculate the energy change in a system in which 56.38 kJ of heat is given off at 2.360 atm pressure and the volume changes from 1.136 L to 0.736 L.
How many moles of methane would need to be reacted in order to heat 4.00 kg (~ 1 gallon) of water (Cs = 4.18 J/g-K) from room temperature (25° C) to boiling (100° C)?
The heat of vaporization of CCl2F2 is 289 j/g.What mass of this substance must evaporate in order to freeze 160g of water initially at 16c? (The heat of fusion of water is 334 j/g the specific heat
Question: The concentration of glucose in blood is approximately 90mg/100 mL. What is the weight/volume percent concentration of glucose? What is the molarity of glucose?
If the oxidizing agent gains 3 moles of electrons, and the reducing agent loses 2 moles of electrons, calculate the work done by a voltaic cell if the emf is 0.985 V.
Calculate the mass of CO2 emitted into the atmosphere upon accelerating the SUV from 0.0 mph to 67.0 mph. Assume that the required energy comes from the combustion of octane with 30% efficiency.
How many liters of pure oxygen gas, measured at 45.2 oC and 104.0 kPa, are required for the complete combustion of 5.60 liters of acetaldehyde gas (C2H4O), measured under the same conditions of temp
A student adds 8.50 mL of a 0.350 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
The pressure of 2.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the
A gas expands against a constant external pressure of 0.9 bar until its volume has increased from 6.8 L to 10.4 L. During this process it absorbs 770.0 J of heat from the surroundings. Calculate the
A gas-filled balloon having a volume of 5.00 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°
What is the EMF measured at a platinum electrode, relative to the standard H2 electrode, in the solution that results from the mixing of the following:
Question: Technetium-99m (gamma emitter, t1/2 = 6.02 hr) is widely used for diagnosis in medicine. A sample prepared in the early morning for use that day had an activity of 6.17 x 10-6 Ci. What wil
An aqueous solution of copper(II) sulfate and an aqueous and an aqueous solution of sodium phosphate are mix together in a beaker. (a) write the balanced equation for the reaction that takes place,
For the diatomic molecule F-Br the following values are known. Determine the partial charge on each element. (1D = 20.8 e-pm)
Why does it take a temperature of almost ,800 degrees C to melt NaCl, but stirring in water at room temperature will also effect a break-up of the lattice?
Explain whether you expect the bond in each molecule to become stronger, weaker, or unchanged upon 1-electron oxidation and 1-electron reduction (HCL HF)
A sample of KClO3 was heated and 350. mL of O2 was collected over water. What mass of O2 was collected? Room T = 23°C, P =675. mmHg.
The vapor pressure of chloroform is 40.0 torr at -7.1 degree Celsius. Its enthalpy of vaporization is 29.2 kJ/mol. Calculate its normal boiling point.
Calculate the mass of gold in 20.0 mL of 1.0 mM HAuCl_4. What is the theoretical number of 13 nm nanoparticles that could be formed in this solution?
Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 35.8 mL of hydrogen gas over water at 27 degrees C and 751mmHg. How many grams of aluminum reacted.
What is the maximum body accumulation of methylmercury at a constant ingestion rate of 4 mg of mercury per day?
Chymotrypsin is initially synthesized as an inactive precursor, chymotrypsinogen. How is it activated and what are the advantages and disadvantages of this type of activation?
Define in one or two sentences the following terms + Indicate one step in glycolysis in which they are significant. kinetic perfection and substrate level phosphorylation.