In the formation of sulphur trioxide by the contact process,
`2SO_(2)(g)+O_(2)(g) hArr 2SO_(3)(g)`
The rate of reaction is expressed as
`-(d(O_2))/(dt) = 2.5 xx 10^(-4) mol L^(-1) s^(-1)`
The rate of disappearance of `(SO_(2))` will be
A. `5.0 xx 10^(-4) mol L^(-1) s^(-1)`
B. `-2.25 xx 10^(-4) mol L^(-1) s^(-1)`
C. `3.75 xx 10^(-4) mol L^(-1) s^(-1)`
D. `50.0 xx 10^(-4) mol L^(-1) s^(-1)`