## moongazer 3 years ago who knows the the formula of graham's law of effusion here? when time or distance is given

1. moongazer

I'll just check if my formula is correct :)

2. anonymous

i think it is $\Huge \frac{r_{1}}{r_{2}}=\frac{\sqrt{d_{2}}}{\sqrt{d_{1}}}$

3. anonymous

@sami-21 I actually think its r(M)½ = constant? But I could be wrong

4. moongazer

molar mass and time are given

5. moongazer
6. anonymous

@gjhfdfg you are correct .

7. moongazer

in terms of molar masses $\Large \frac{r_{1}}{r_{2}}=\frac{\sqrt{M_{2}}}{\sqrt{M_1}}$