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The combustion of propane illustrated by the following reaction releases 2428 KJ per mole of reaction. A sample of propane is burned at 59 degrees celsius and 746 mm Hg. The process produces 39.7 L
Describe three ways to could make and acetic acid/acetate buffer with acetic acid, sodium acetate, deionized water, a solution of hydrochloric acid and a solution of sodium hydroxide.
Suppose you wanted to make a pH=4.25buffer. What would be the best acid/base system: acetic acid/acetate or lactic acid/lactate? THe Ka of lactic acid is 8.32x10(exponent -4). Throughly explain your
How many grams of dry NH4Cl need to be added to 1.50 L of a 0.300 M solution of ammonia, NH3, to prepare a buffer solution that has a ph of 8.73? pkb for ammonia is 1.8X10^-5.
Assume that 50.00ml of 0.100M HCl was added to 125ml of 0.100M sodium acetate. Is the resulting solution a buffer? Why or why not? Calculate the pH of the resulting solution.
The pre-exponential factor for the gas-phase decomposition of ozone (unimolecular reaction) is 2.3x1013 L mol-1 s-1, and the experimental activation energy is 30.0 kJ mol-1. What is (a) the entropy,
Calculate the percentages of dissociated and undissociated forms present in the following solutions:
Look up the molar mass and the density of 2-chloro-2-methylpropane in a reference book such as The Merck Index. Calculate the number of moles of HCl that are produced by complete hydrolysis of 1.0 m
Describe the role of the citric acid cycle as a central metabolic mechanism. Explain what happens to the cells' abilities to oxidize acetyl CoA when intermediates of the cycle are drained off for am
a student dissolves a 6.58g sample of solid sodium hydroxide in 127.3g of water. Assuming that there is no heat exchanged with the surroundings, how much energy is given off? Show your calculations.
How many Joules of energy are stored in 1 pound (454 g) of sucrose? (Assume: Pressure = 1 atm, Temperature = 25°C; the respective ?Hf° for the reactants and products can be found in the ther
The reaction vessel is charged initially with SO3(g) and NO(g), each at a partial pressure of 0.500 atm. In the space below, enter the equilibrium the partial pressure of SO2(g) in units of atm
Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients. What is the sum of all the coefficients in the equation
Consider the following standard reduction potentials in acid solution: Cr3+ + 3e- ? Cr Eo = -0.74 V, Co2 + 2e- ? Co Eo = -0.28 V, MnO4 + 8H+ + 5e- ? Mn2+ + 4H2 Eo = +1.51 V
How many minutes would be required to electroplate 25g of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl3
The ozone in the ozone layer absorbs UV light between 200 and 300 nm. Ozone is a compound with the chemical formula CO2. In the Earth's atmosphere, ozone exists only in the ozone layer.
The initial pH of chloroacetic acid is 1.90, (which I found from using the quadratic equation to find x in a RICE table because I was given the initial concentration of 0.124M and told to find the p
Trouble understanding the relationship between the Ka and how acidic a chemical is. Is it safe to say that the more acidic a chemical is the higher the Ka value will be
Based on your understanding of the relationship between acid/base behavior and chemical structure, match the Ka with each acid. Then calculate the pKa which corresponds to each value.
Given a stock solution of a food dye having a concentration of 1.0 x 10-5 and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 15.4 mL of di
If the temperature probe in an experiment is not calibrated and the values are 3.5 degrees C higher than they should be, what effect will that have on the delta T values when the initial value is me
AgCl is a sparingly soluble salt, with a solubility of about 10-5 M in pure water. Adding KCN increases the solubility of AgCl because:
Which of the following substances, when added to a saturated solution of AgCO3, will increase the solubility of AgCO3 in the solution?(select all that applies)
Calculate DG for the isothermal compression of 30.0 g of water from 1.0 atm to 100.0 atm at 25 °C; neglect the variation of V with P. The density of water at 25 °C is 0.997 g/cm3.