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

1. moongazer

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

2. sami-21

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

3. gjhfdfg

@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. sami-21

@gjhfdfg you are correct .

7. moongazer

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