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(a) Using standard enthalpies of formation, calculate the change in enthalpy for the following reaction: 2C6H6 + 15O2 = 12CO2 + 6H2O.
(b) How many grams of C6H6 must be combusted in the above reaction to produce 2570 kJ of heat energy?
a zero-order reaction has a constant rate of 1.90times10-4 . if after 40.0 seconds the concentration has dropped to
why does one begin a column elution with non polar solvents and progress to more and more polar solvents
The rate constant for the second- order reaction.starting with a concentration of 0.86m, calculate the concentration of NOBr after 57s.
a rotary drum filter with a filter area of 200 m2 and a vacuum pressure of 75 kpa is to be used to remove cells from a
a cylinder of compressed gas has a pressure of 4.882 atm on one day. the next day the same cylinder of gas has a pressure of 4.690 atm, and its temperature is 8 degrees celcius. what was the temperature on the previous day?
(a). What is the trend in electronegativity going from left to right in a row of the periodic table? (b) How do electronegativity values generally vary going down a column in the periodic table?
How will density, melting,and boiling point temprature hardness elastisity,expansion,conductivity been infulance atomic constution.Explain.
A gaseous mixture of O2 and N2 contains 39.8\% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 385mmHg
A flask contains 0.390 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
calculate the molarity of a solution made by dissolving 12.5 grams of Na2CrO4 in enough water to form exactly 550mL of solution
What is partial pressure of O2 in atmospheres? What is the partial pressure of Ne in atmospheres?
A 45.0 g block of aluminum initially at 28.0C absorbs 548 J of heat. What is the final temperature of the aluminum?
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