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(solution) A flask is charged with0.130mol of A and allowed to react to form


A flask is charged with0.130mol of A and allowed to react to form B according to the following hypothetical gas-phase reaction.

A(g)  B(g)

The following data are collected.

times (s) 0 40 80 120 160
moles of A 0.130 0.070 0.044 0.030 0.025



(a) Calculate the number of moles of B at each time in the table. 

0 s
 mol

40 s
 mol

80 s
 mol

120 s
 mol

160 s
 mol 



(b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 

0 - 40 s
 mol/s

40 - 80 s
 mol/s

80 - 120 s
 mol/s

120 - 160 mol/s
 mol/s 

 


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Sep 13, 2020

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