Chemistry

Problem

For a reaction obeying the rate law

\text{rate}=k[X]^{1/2}[Y]

, an experiment performed with initial concentrations

[X]_0

and

[Y]_0

gives an initial rate

r_0

. If a second experiment is carried out at

[X]_0'=9[X]_0

while keeping

[Y]_0

unchanged, what is the expected initial rate

r'

? a)

9r_0

\dfrac{1}{3} r_0

3r_0

4.5\,r_0