Question

Balance the following equation:

AL + HCL ➡ ALCL3 +H2

Answer 1

al + hcl →alcl3 + h2
this equation {al + hcl }means,       
          al=1
          h=1
          cl=1
the next equation after the reaction {alcl3 + h2 },\
          al=1
          cl=3
           h=2
so after the atoms in the equation is balanced we get,
         2al+6hcl →2alcl3+3h2