- Carbon dioxide is a kind of gas
- Baking soda can react chemically with vinegar producing carbon dioxide
- Therefore, baking soda can react chemically with vinegar producing a gas

- Vinegar is a kind of substance
- Baking soda is a kind of substance
- So, combining baking soda and vinegar is combining two substance together

- Baking soda can react chemically with vinegar producing a gas
- Combining baking soda and vinegar is combining two substance together
- So, combining baking soda and vinegar can cause chemical reactions

- Combining baking soda and vinegar can cause chemical reactions
- Vinegar is added into baking soda
- So, vinegar being added into baking soda will cause chemical reactions

Therefore, vinegar being added into baking soda will cause chemical reactions
Which is an example of a chemical reaction?
- Carbon dioxide is a kind of gas 
- Vinegar is a kind of substance 
- Vinegar is added into baking soda 
- Baking soda is a kind of substance 
- Baking soda can react chemically with vinegar producing carbon dioxide