Question

select the correct number
the equation shows neutralization of an acid and a base to produce a salt and water.
2hcl + na₂o → xnacl + h₂o
which value of x will balance the equation?

Explanation:

Step1: Count Na atoms left

Reactants: 2 Na (from Na₂O)

Step2: Balance Na on right

Products: x NaCl needs 2 Na → x=2

Step3: Verify Cl balance

Left: 2 Cl (2 HCl); Right: 2 Cl (2 NaCl). Balanced.

Answer:

2