Conisder the chemical reaction
`N_(2)(g) + 3H_(2)(g) rarr 2NH_(3)(g)`
The rate of this reaction can be expressed in terms of time derivatives of the concentration of `N_(2)(g), H_(2)(g)`, or `NH_(3)(g)`. Identify the correct relationship among the rate expresisons.

Options

A. Rate `= -d//[N_(2)]//dt = -1//3d[H_(2)]//dt`
`=1//2d[NH_(3)]//dt`
B. Rate `=-d[N_(2)]//dt=-3d [H_(2)]//dt`
`=2d[NH_(3)]//dt`
C. Rate `=d[N_(2)]//dt = 1//4 d [H_(2)]//t`
`=1//2 d[NH_(3)]//dt`
D. Rate `=-d[N_(2)]//dt =-d[H_(2)]//dt`
`=d[NH_(3)//dt`

Answer

A

Explanation

`N_(2)(g)+3H_(2)(g)rarr2NH_(3)(g)`
Instantaneous rate
`=-(d[N_(2)])/(dt)=(-1)/(3)(d[H_(2)])/(dt)=(1)/(2)(d[NH_(3)])/(dt)`.