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Utilizing bond energies, compute the enthalpy change for the burning of one mol of acetylene gas with excess oxygen gas yielding carbon dioxide gas as well as gaseous water (steam)
a. -822 kJ
b. -1222 kJ
c. -1484 kJ
d. -1643 kJ
e. -1862 kJ
consider the following reaction 4hcl o2 ---gt 2h2o 2cl2. how many molecules of would be formed from the reaction
how many moles of copper nitrate are present in 5 ml of 1.20 M copper nitrate? how do you arrive at that answer?
what is the purpose of a buffer system? b)what is the purpose of NaNO2 in the buffer? c)how does the buffer react when some H3O^+ is added? d)how does the buffer react when some OH^- is added?
basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
Reaction of 3-pentanol with potassium iodide in aqueous ethanol gave no reaction under several different reaction conditions. If one adds a catalytic amount of para-toluenesulfonic acid
Express your answers using two significant figures. Enter your answers numerically separated by commas. [HCO2H], [HCO?2], [H3O+], [OH?] = Part C Also calculate the percent dissociation. Express your answer using two significant figures.
The equilibrium constant Kc equals 1.6 10-2 at 200°C. What are the moles of substances in the equilibrium mixture at 200°C if we start with 0.021 mol HBr in a 1.3-L vessel?
draw 3 main mechanism steps in preparation of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexanone.using NAOH as base and ethanol as proton source
the rate constant for the equation2c2f4 -gt c4f8is 0.0406 m-1 s-1. we start with 0.236 mol c2f4in a 3.00-liter
A sample of rock is found to have a 235U/207Pb ratio of 1 to 15. From its minerology, we know that it contained no lead at the time when it first crystallized. How old is the rock
a 81 l sample of dry air cools from 145c to -22c while the pressure is maintained at 2.85 atm. what is the final
When 54.01 g of Ba(NO3)2 is dissolved into a total volume of 3.23L of solution.
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