# Problem: The half-life for the first order conversion of cyclobutane to ethylene, C4H8(g) → 2C2H4(g) is 22.7 s at a particular temperature. How many seconds are needed for the partial pressure of cyclobutane to decrease from 100 mmHg to 10 mmHg?  (A) 52.0 s (B) 75.4 s (C) 90.0 s (D) 227 s

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###### Problem Details

The half-life for the first order conversion of cyclobutane to ethylene,

C4H8(g) → 2C2H4(g)

is 22.7 s at a particular temperature. How many seconds are needed for the partial pressure of cyclobutane to decrease from 100 mmHg to 10 mmHg?

(A) 52.0 s

(B) 75.4 s

(C) 90.0 s

(D) 227 s

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Based on our data, we think this problem is relevant for Professor Dornshuld's class at MSSTATE.