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What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear?
8.05×10-4 KJ/mol
How would you make a buffer with a volume of 2.0 L, pH of 5.0 and a strength of 0.25 M using 5.0 M acetic acid stock solution (Ka = 1.8x10-5) and sodium acetate ( NaO2C2H3 available as a solid salt FW = 82 g/mole).
What is the mole fraction of ethanol in a solution made by dissolving 14.6 g of ethanol in 53.6 g of water?
Determine the number of moles of O2 produced by the decomposition of 426 g of NaClO3
Write a balanced equation for the following reaction: nitric acid reacts with calcium hydroxide to produce water and calcium nitrate
A 1.0-L buffer solution is 0.105M in HNO 2 and 0.145M in NaNO 2. Determine the concentrations of HNO 2 and NaNO 2 after addition of 1.4g NaOH.
Define amphoteric behavior and give an example of it other than the one given in your lab manual.
because the electronegative chlorine atom pulls electrons away from the O-H bond and thus weakens it. Calculate the hydronium-ion concentration and the pH of a 0.0022 M solution of chloroacetic acid. Ka is 1.3 10-3.
What mass of potassium benzoate is needed to prepare one liter of a 0.135M solution of potassium benzoate?
The reaction of 0.130 moles of a metal with an acidic aqueous solution in a calibrated calorimeter causes the temperature to increase by 49.0°C.
An aqueous solution is 22.0% by mass ethanol, CH3CH2OH, and has a density of 0.966 g/mL. what is molality of ethanol
Assume that a particular reaction evolves 241 {rm kJ} of heat and that 33 {rm kJ} of PV work is gained by the system.
When 1.441 g of this compound (molar mass = 195.80 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 4.337 degrees Celsius. What is the heat capacity (calorimeter constant) of the calorime..
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