polyatomic ion consists of more than one atom
sulphate is polyatomic ion
The answer woulda be C - Pure substance
Answer:
C. Energy can change one form to another
Explanation:
There are many different types (forms) of energy
using PV=mRT/Mr
V=(4.9×8.31×(273+20))/(24.3×101.5×10^3)
=4.84×10^-3 m^3
=4.84×10^6 mm^3
