Chemical reaction types

Question

how do you know the type of chemical reaction?

for example

CO O2=?

As2I3 H2O

I'm a little confused too,when getting the product,what happens to the subscripts?

LiHCO3

CaCl2*H2O (* is a dot)

please help,thanks in advance.

Answer 1

2 CO + O2 >> 2 CO2

2 LiHCO3 + CaCl2 +H2O >> CaCO3 + 2 LiCl + H2O