Which chemical equation represents a redox reaction?(1 point) 1.) Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(l)

2.) CaO(s) + SiO2(s) → CaSiO3(l)

3.) CaCO3(s) → CaO(s) + CO2(g)

4.) TiCl4(s) + 2H2O(g) → TiO2(s) + 4HCl(g)

PLEASE HELP!!!

Agene in a type of bacteria when the ses bacteria reproduce asexually this mutation can only be inherited by

Im is in a crowd of people at the mall looking for his girlfriend tammy, who was supposed to meet him for dinner. jim realizes tammy is across the room as he catches a whiff of her overpowering perfume, 'paris #6'. which process explains why jim is able to smell the perfume?

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.