# How does volume relate to mass with respect to the water molecule?

Because I am too lazy to go thru the calculation, this site reports that the density of water under standard conditions is $1.0 \cdot g \cdot c {m}^{-} 3$ at $4$ ""^@C as the liquid, and $6 \times {10}^{-} 4 \cdot g \cdot c {m}^{-} 3$ at $100$ ""^@C as the gas.