Question

1) The decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C

H₂O₂(aq)H₂O(l) + ½ O₂(g)

is first order in H₂O₂ with a rate constant of 1.10×10^-3 min^-1.

If the initial concentration of H₂O₂ is 9.20×10^-2 M, the concentration of H₂O₂ will be 1.83×10^-2 M after____________ min have passed.

2) The gas phase decomposition of dimethyl ether at 500 °C

CH₃OCH₃(g) CH₄(g) + H₂(g) + CO(g)

is first order in CH₃OCH₃ with a rate constant of 4.00×10^-4 s^-1.

If the initial concentration of CH₃OCH₃ is 7.38×10^-2 M, the concentration of CH₃OCH₃ will be _____________M after 4459 s have passed.

Answer 1