Question

when molecules spread apart, they are...
more dense
less dense
rewatch skip

Explanation:

Density is defined as mass per unit volume ($
ho = \frac{m}{V}$). When molecules spread apart, the same mass occupies a larger volume. Since density is inversely related to volume (for constant mass), a larger volume leads to lower density. So when molecules spread apart, they are less dense.

Answer:

B. less dense (assuming the second option is labeled as B, with the option text "less dense")