Problem: A student studied the kinetics of the reaction  C2H4(g) → C2H2(g) + H2(g)  by monitoring the C2H4 concentration (in moles/L) as a function of time. The student made a plot of ln [C2H4] against t. The plot was a straight line with the equation y = −0.618x − 1.427 (where y = ln [C2H4] and x = t). What was the initial C 2H4 concentration? a) 0.62 moles/L b) 4.17 moles/L c) 0.24 moles/L d) 0.78 moles/L e) 1.62 moles/L

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Problem Details

A student studied the kinetics of the reaction 

C2H4(g) → C2H2(g) + H2(g) 

by monitoring the C2H4 concentration (in moles/L) as a function of time. The student made a plot of ln [C2H4] against t. The plot was a straight line with the equation y = −0.618x − 1.427 (where y = ln [C2H4] and x = t). What was the initial C 2H4 concentration?

a) 0.62 moles/L

b) 4.17 moles/L

c) 0.24 moles/L

d) 0.78 moles/L

e) 1.62 moles/L

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