Answer:
1.66x10^-24 M
Explanation:
By definition, 1 mole = 6.02x10^23 particles, or molecules, in this case. Use this relationship as a conversion factor:
((1 mole)/(6.02x10^23 molecules))
Use this conversion factor to calculate moles of the solute when only 1 molecule is present:
(1 molecule)/((1 mole)/(6.02x10^23 molecules)) = 1.66x10^-24 moles
The molecules cancel, leaving only moles.
Concentration, by definition, is the moles per liter of a solute. Take the
1.66x10^-24 moles and divide by the volume, which is 1.0L here:
(1.66x10^-24 moles solute)/(1.0 Liter) = 1.66x10^-24 molar, or 1.66x10^-24 M
