Balanced chemical equations solutions

Try these exercises.
1) 2Sr(s) + O2 (g) => 2SrO(s)

2) 2HBr (g) + Ca(OH)2 (s) => CaBr2 (s) + 2H2O(l)

3) 4Al(s) + 3O2(g) => 2Al2O3(s)

4) 2C3H6(g) + 9O2(g) => 6CO2(g) + 6H2O(l)

5) Pb(NO3)2(aq) + 2KI (aq) => PbI2(s) + 2KNO3(aq)

6) 6HCl (aq) + 2Al (s) => 2AlCl3(aq) + 3H2(g)

7) H2SO4(aq) + CaCO3(s) => CO2(g) + H2O(l) + CaSO4(aq)