In the given chemical equation:
\[ \text{H}_2\text{CO}_3 \rightarrow \text{H}_2\text{O} + \text{CO}_2 \]
Let's break it down:
-
Reactant (H2CO3):
- The formula H2CO3 (carbonic acid) contains:
- 3 oxygen atoms (from CO3).
- The formula H2CO3 (carbonic acid) contains:
-
Products (H2O and CO2):
- H2O contains 1 oxygen atom.
- CO2 contains 2 oxygen atoms.
- Therefore, in total, the products contain:
- 1 (from H2O) + 2 (from CO2) = 3 oxygen atoms.
Summary:
- Number of oxygen atoms in the reactant (H2CO3): 3
- Number of oxygen atoms in the products (H2O + CO2): 3