False. A mixture represents elements or molecules which are not chemically combined.
Answer:
C. When melted rock solidifies.
Molecules do not have enough kinetic energy to overcome the intermolecular bonds.
There are 5 valence electrons in a atom of phosphorus.
Explanation:
a) 3Pb(NO3)2 + Al2(SO4)3 ---> 3PbSO4 + 2Al(NO3)3
Double displacement
b) 2Cl2 + 3O2 ---> 2Cl2O3
Synthesis
c) 2Fe2O3 + 3C ---> 4Fe + 3CO2
single displacement
