The equation for the chemical reaction shown is not balanced. What number should replace the question mark to balance this equation?

2Al + ?Cl2 → 2AlCl3

A.
the number 4

B.
the number 2

C.
the number 5

D.
the number 3

Question

The equation for the chemical reaction shown is not balanced. What number should replace the question mark to balance this equation? 
 
2Al + ?Cl2 → 2AlCl3
 
 A.
the number 4
 
 B.
the number 2
 
 C.
the number 5
 
 D.
the number 3

anonymous · Answer

help

anonymous · Answer

please help

anonymous · Answer

Count your number of chlorine atoms. How many do you have in the product? Remember that you can't create or destroy matter (well, at least not in chemical reactions), so the number of chlorine atoms remain the same on both sides.
A chlorine molecule has 2 chlorine atoms in it, so how many molecules do you need?

shamim · Answer

Number of clorine atom in the right side is 2*3=?
So number of clorine atom in the left side will b 6

shamim · Answer

Feel ftee to ask for more clarification