Neon gas effuses through an opening in 52 seconds, an unknown gas effuses the same distance in 76.8

Calculate the molecular mass of the unknown gas

Since neon is a monoatomic gas then

tx/tNe=√x/MmNe

76.8/52=√x/20

1.48=√x/20

squaring both sides we have:

2.19=x/20

cross-multiply.

2.19*20=x

then;

x=43.8

therefore the molecular mass of the unknown gas is 43.8g/mol.