The decomposition of dimethyl ether, (CH3) 2O. at 510 °C is a first-order
pocess with a rate constant of 6.8 x 10-4s-1:
(CH3) 2O(g) → CH4 (g) + H2 (g)+ CO(g)
If the initial pressure of (CH3) 2O is 135 torr, how long will it take when
the pressure of (CH3) 2O drops to 51 torr?
(A) 17.9 s (B) 1020 s (C) 1430 s (D) 1.23 x 105 s
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