Solid gold has a greater density than liquid gold what must happen to the volume of a given mass of solid gold when it becomes a liquid

There's an inverse relationship between density and volume. The higher the density, the smaller the volume occupied because the particles are compact; the lower the density the higher the volume - molecules are further apart. Hence objects with higher densities tend to have small volume but mass doesn't change. Since solid gold has a greater density than liquid gold this means solid gold occupies a smaller volume than the same mass of solid gold. If solid gold changes to liquid, now the particles are further apart and so the volume increases.

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)