Question

what is the correct coefficient ratio to have the equation balanced? mg + hcl → mgcl₂ + h₂ 1:2:1:1 1:2:1:2 1:1:1:1 2:1:2:2

Explanation:

Step1: Balance chlorine atoms

On the right - hand side, there are 2 chlorine atoms in \(MgCl_2\). So, we need 2 moles of \(HCl\) on the left - hand side. The equation becomes \(Mg+2HCl
ightarrow MgCl_2 + H_2\).

Step2: Check other atoms

For magnesium (\(Mg\)): 1 atom on the left and 1 atom on the right. For hydrogen (\(H\)): 2 atoms in \(2HCl\) (left) and 2 atoms in \(H_2\) (right).

Answer:

1:2:1:1