Answer:
Water vapor to dew
Explanation:
Water vapor turns from a gas into a liquid, such as dew on the morning grass.
In your equation, the molecule Ca3(PO4) is not possible. I believe you just forgot the 2 after the PO4.
If that is the case, the coefficients would go as follows:
3, 2, none, 6
Density is equal to the mass divided by the voulme.
So: 2.5 multiplied by 2.5 by 2.5.
Then: 295 divided by 16.625=18.88g/cm to the power 3
Melting can always be changed back. Also remember that a physical change is a change of state. When you melt you go from a solid to a liquid. Flammability is a chemical property because you burn it.