2Al + 3NiSO4 --> Al2(SO4)3 + 3Ni what reaction is this

How to convert a density of 0.791g/cm3 to lb/ft3

Which compound contain an iron with a 3+ charge

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.