1.

For the reaction N_2+3H_2 to 2NH_3, rate of reaction with respect to hydrogen may be expressed as (-d[H_2])/(dt). In it, the expression as -(d[H_2])/(dt) represents

Answer»

a negative RATE of reaction
amount of hydrogen left unreated
DECREASE in concentration of `H_2` in unit time
decrease in the rate of CHANGE in concentration of hydrogen

Solution :The MINUS sign in the expression `- d[H_(2)]//dt` indicates a decrease in the concentration of hydrogen in unit time .


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