If a large marshmallow has a volume of 3.25 in3 and density of 0.242 g/cm3, how much would it weigh in grams? 1 in3=16.39 cm3

The formula to find weight would be density multiplied by volume. In this question, you are given the volume (3.25inch3), the density (0.242 g/cm3). Since the unit used in the volume and density is different, we need to convert it. The calculation would be:

weight = density * volume
weight = 3.25inch3 * (16.39 cm3/inch3) * (0.242 g/cm3)= 12.89 grams

Yes it would be a physical change.

What are the options? physical property can be color, smell, opacity, viscosity, density, infra red spectrum, melting and boiling points, attraction and repulson to magnets, etc.