Please help!! A 22.4 L Sample of which of the following substances, at STP, would contain Avogadro’s number of particles?
A. Phosphorus B. Mercury C. Nitrogen
The “22.4 L = 1 mole” principle holds only for gases (and even then, technically only for ideal gases). In any case, the only element given here that would be a gas at STP would be nitrogen. So, the answer would be choice C.
