9:49 PM 82% session.masteringchemistry.com C Welcome Stude.. Maze Runner: T..Elementary Dif.. Watch The Wal... The revers ble chemical reacion A +B C+D has the folowing equilierium constant Part A Iniially, orly A and B are present, each at 2.00 M. What is the Sinal concentration of A once equilibrium is reached? Express your answer to twe significant figures and include the appropriate units. View Available Hint(s) [A] = 0.57 M Correct PartB what is the final concentration of D ateauilibrium if he intial concerwasons are IA|-1.00 Mand +200 M? Express your answer to two significant figures and include the appropriate units. View Available Hint(s) \" 1.71 Submt X Incorrect: Try Again; 4 attempts remaining Provide Feedback
A + B ---------------> C + D
I 2 2 0 0
C -x -x +x +x
E 2-x 2-x +x +x
kc = [C][D]/[A][B]
6.2 = x*x/(2-x)(2-x)
6.2 = (x/2-x)^2
2.489 = x/2-x
2.489*(2-x) = x
x = 1.43
[A] = 2-x = 2-1.43 = 0.57M
part-B
A + B ---------------> C + D
I 1 2 0 0
C -x -x +x +x
E 1-x 2-x +x +x
kc = [C][D]/[A][B]
6.2 = x*x/(1-x)(2-x)
6.2*(1-x)(2-x) = x^2
x = 0.89
[D] =x = 0.89M
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