Answer
Less than double.
Work Step by Step
We know that density is equal to mass over volume. Thus, the equation PV=nRT simplifies to:
$\frac{P_1}{T_1d_1}= \frac{P_2}{T_2d_2}$
Thus, we find that the second density is equal to:
$ d_2 = \frac{2(373)}{1(393)} = 1.9 d_1$
Thus, we see that it is less than double.
