Answer:
I say both I hope this helps
1000cm³=1litre
1.5x10^6cm^3=1.5x10^6cm^3/1000litre=1.5×1000000/1000=1.5×1000=1500litres.
4Al + 3O2 -> 2Al2O3
2N2 + 6H2 -> 4NH3