Caverns are mostly formed in limestone.
Selective 5-HT3 receptor antagonist
Because every second they reproduce
Answer:
CH3 + 2O2-----> CO2+2H2O
Na+ + Cl- ------> NaCl
4Al + 3O2------> 2Al2O3
N2+ +3H2 ------> 2NH3
(6,7,8) I can't see the small numbers