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You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.140 M sodium benzoate. How much of each solution should be mixed to prepare this buffer?
Sulfuryl chloride, SO2Cl2, decomposes when heated:
Question: He and O2 gases are mixed. A 40L He cylinder with 10atm pressure is connected to a 10 L O2 cylinder with 5atm pressure. The valve between them is opened and the gases completely mix. Wha
When food inside the pressure cooker boils, steam is produced. Using the particle theory of matter, please explain (i) why the food inside the pressure cooker can be cooked at a very high pressure.
Assume that a reaction takes place at 296 K and 306 K. What must the activation energy be for the rate constant to double as described?
Determine the percent composition by mass of a 100 g K2SO4 solution containing 20-g solute. What is the mole percent composition of the solute, assume that solution consists of 100 g water and 20 g K
Discuss in detail one way which atomic nuclear decay takes place. What is the significance of the atomic nuclear decay? Analyz the societal implication of using this process.
What volume (mL) of sulfur dioxide can be produced by the complete reaction of 3.82 g of calcium sulfite with excess HCl (aq), when the final SO2 pressure is 827 torr at 44.0 °C?
A solution is made by mixing 49.0 mL of ethanol, C2H6O, and 51.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C?
Assuming that the Henry's law constant for CO2 in the drink is that same as that in water, 3.7 x 10-2 mol/L atm, calculate the solubility of carbon dioxide in this drink.
Write down all species (including states) that are present in signicant amounts when the following solids are added to water.
A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask, and then adding enough water to give a final volume of 200.0 mL. What is the molarity of the solution?
Calculate the boiling point (in degrees C) of a solution made by dissolving 2.87 g of sucrose in 29.6 g of water. The Kbp of the solvent is 0.512 K/m and the normal boiling point is 373 K.
Sulfur reacts with oxygen to produce sulfur dioxide, but only if the high activation energy is supplied. Which condition will lower the activation energy the most?
Does the oxidation of free FADH2 by ubiquinone under the standard biochemical conditions provide sufficient free energy for synthesis of ATP from ADP and Pi?
Question: A gas occupying a volume of 847 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
Calculate the vapor pressure at 40 °C of a solution that has 17.8 g urea, CO(NH2)2, dissolved in 300.0 mL water. The vapor pressure of pure water at 40 °C is 55.3 mmHg.
If clean magnesium metal burned in air it would form magnesium oxide. Suppose the magnesium had a this oxide coating. How would this affect moles of oxygen per mole of magnesium?
In a hydrogen atom, the 2s and the 2p orbitals have the same energy. In a nitrogen atom, the energies of 2s and the 2p orbitals are different. Explane why.
If a chalice made of pure gold weighing 0.6 kg and initially at 25 C is filled with 150.0 mL of water at 83 C, what is the final equilibrium temperature of the system? The heat capacities of water a
A sample of liquid mercury (mass 57 g and temperature 181.0 C) is poured into 80 g of H2O at 15 C. Calculate the final temperature of the mixture, assuming no heat is lost. The heat capacities of Hg a
Given that mercury has a delta Hvap of 59.11 kJ/mol and its normal boiling point is 356.7 degrees C, calculate the vapor pressure in mm Hg at room temperature, 25 degrees Celcius.
When sulfur trioxide gas reacts with water, a solution of sulfuric acid forms. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
A 2.91 Liter flask at 17 degrees celsius contains a mixture of N2, He and Ne at partial pressures of 0.253 atm for N2, 0.155 atm for He and 0.477 atm for Ne. Calculate the volume in liters at STP occu
Draw the major Diels-Alder product formed in the given reaction. All hydrogen atoms are implied. If a chiral carbon atom is attached to a hydrogen atom.