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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