Question

use the unbalanced chemical equation to answer the question.
2nahco₃ → na₂co₃ + co₂
which of the following can be added to the products to balance the equation?
(1 point)
○ h₂
○ o₂
○ ch₂oh
○ h₂o

Explanation:

Step1: Count atoms on reactant side

Reactant: \(2NaHCO_3\). Atoms: \(2Na\), \(2H\), \(2C\), \(6O\)

Step2: Count atoms on product side (without added substance)

Products: \(Na_2CO_3+CO_2\). Atoms: \(2Na\), \(0H\), \(2C\), \(5O\)

Step3: Determine missing atoms

Missing \(2H\) and \(1O\). \(H_2O\) provides \(2H\) and \(1O\)

Answer:

\(H_2O\)