calculate the molar mass of a gas that diffuses three times faster than oxygen?

Answer 1

use the equation rate = sq root of molar mass of O2/ sq root of molar mass of unknown gas...

since you know your rate and the molar mass of oxygen, it's just a matter of substituting the values and using them for the equation so that you'd come up with

3= sq root 32/sq root x

from there, square the entire equation to get rid of the sq roots

9=32/x

then its simply a matter of doing some algebra... isolate x to find out the molar mass of the unknown gas

i hope that helps...