If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate it's vapour density.

When the vapor density defined as the mass of a certain volume of the substance divided by the mass of the same volume of hydrogen.

So Vapor density = molar mass of gas/molar gas of hydrogen

when we have the molar mass of the tetraoxosulphate (VI) = 98 & and we have the molar mass of Hydrogen = 2 so by substitution.

∴ Vapor density = 98 / 2 = 49