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A flask is charged with 0.124 mol of A and allowed to react to from B...

A flask is charged with 0.124 mol of A and allowed to react to from B according to the reaction: A(g) -> B(g). the following drata are obtained for [A] as the reaction proceeds:

time: 0.00 10.0 20.0 30.0 40.0

moles of A: 0.124 0.110 0.088 0.073 0.054

A) what is the average rate of disapperance of A between 10s and 20s?

B) what is the avergae rate of disappearance of A between 20s and 40s?

C) what is the average rate of appearance of B between 20s and 30s?

D) How many moles of B are present at 10s?

E) how many moles of B are present at 30s?

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