The first-order rate constant for the decomposition of dimethyl ether (CH3)2O(g) -> CH4(g) + H2(g) + CO(g) is 3.2x104 s1 at 450C. The reaction is carried out in a constant-volume flask. Initially only dimethyl ether was present, and the pressure was 0.350 atm. Assume ideal behavior.

(a) What is the gas concentration (n/V) of dimethyl ether after 10.0 min? (Hint: n/V = P/RT) The answer is ___x10-3 (answer format: _.__)

(b) What is the pressure of the flask after 10.0 min?