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INSTANT ANSWER

The following mechanism has been proposed for the thermal decomposition of acetaldehyde (ethanal). (8)a) CH3CHO →∙CH3 + CHOb) ∙CH3 +CH3CHO → CH4 + ∙CH2CHOc) CH2CHO → CO + ∙CH3d) ∙CH3 + ∙CH3 → CH3CH3Find the expression of the rate of formation of methane and the rate of disappearance of acetaldehyde

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INSTANT ANSWER

Chlorine atoms react rapidly with ozone in the gas-phase bi-molecular reaction Cl + O3 → ClO + O2with k = (1.7 x 10-10 dm3 mol-1s-1)e-260/(T/K). Estimate the rate of the reaction at (a) 20 km, where [Cl] = 5x 10-17 mol dm-3, [O3] = 8 x 10-9 mol dm-3, and T = 220 K; (b) 45 km, [Cl] = 3 x 10-15 mol dm-3, [O3] = 8 x10-11 mol dm-3, and T = 270 K(8)2

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