We know that there are 100 cm in 1 m, so we can use this to convert to meters:

Therefore we know that
cm is equal to 2.41 m.
Mn+2 is cation and CO3 is anion
hope it help
Chlorine will have the slowest rate of diffusion because it has the highest relative molecular mass of 71 followed by O₂ with 32, then Neon 20 then He with 2
The rate of diffusion of a gas is inversely proportional to the square root of its relative molecular mass.