Question

In a chemical reaction, x + 2 y z, if the rate of appearance of z is 0.50 moles per litre per hour, then the rate of disappearance of y is

• A. 0.25 mol L^-1 hr^-1
• B. - 1.0 mol L^-1 hr^-1
• C. Cannot be predicted
• D. 0.5 mol L^-1 hr^-1

Answer 1

The correct option is B

- 1.0 mol L^-1 hr^-1

According to the given equation, the rate of disappearance of y is twice the rate of appearance of z. so the rate of disappearance of y = 2 x 0.50 = - 1.0 mol L^-1 hr^-1