Since a single molecule of a certain compound has a mass of 3.4 x 10⁻²² , the mass of a mole of the compound is closest to 200 g/mol
Since a single molecule of a certain compound has a mass of 3.4 x 10⁻²² To find which value comes closest to the mass of a mole of this compound, we proceed as follows.
We know that the mass of a single molecule of the compound is 3.4 x 10⁻²² g/molecule.
Now, we know that Avogadro's constant shows the number of molecules per mole of the substance which is 6.022 × 10²³ molecules/mol.
So, the mass of a mole of the compound would be, m = mass of a single molecule × number of molecules per mole = 3.4 x 10⁻²² g/molecule × 6.022 × 10²³ molecules/mol = 20.4748 × 10 g/mol
= 204.748 g/mol
From the options, the closest value to this is 200 g/mol
So, the mass of a mole of the compound is closest to 200 g/mol