Final answer:
The incorrect combination is CO₂ as Carbon Monoxide; the correct name for CO₂ is Carbon Dioxide.The incorrect name-formula combination among the options is 3) CO₂ - Carbon Monoxide.
Step-by-step explanation:
The incorrect name-formula combination among the options provided is CO₂ - Carbon Monoxide. The correct name for CO₂ is Carbon Dioxide. Carbon Monoxide would be CO, with one oxygen atom, whereas Carbon Dioxide has two oxygen atoms. Let's clarify each name-formula combination:
- H₂O is correctly associated with Water.
- NaCl is correctly associated with Sodium Chloride.
- CO₂ is incorrectly associated with Carbon Monoxide; it should be Carbon Dioxide.
- CaCO₃ is correctly associated with Calcium Carbonate.
Carbon Monoxide is represented by the formula CO, not CO₂. CO₂ actually corresponds to Carbon Dioxide. Carbon Monoxide consists of one carbon (C) atom and one oxygen (O) atom, while Carbon Dioxide has one carbon atom and two oxygen atoms. It's essential to pay attention to the subscripts in chemical formulas, as they indicate the number of each type of atom in the compound. In the case of Carbon Monoxide, the correct chemical formula is CO, not CO₂ as stated in the option.