Which of the following molecule/molecules have zero dipole moment?
`CO_(2),CBr_(4),BCl_(3),BeCl_(2)`

Explanation

To determine which of the given molecules have a zero dipole moment, we need to analyze the molecular geometry and the electronegativity of the atoms involved in each molecule. The molecules in question are CO₂, CBr₄, BCl₃, and BeCl₂.

### Step-by-Step Solution:

1. **Understanding Dipole Moment**:
- A dipole moment occurs when there is a separation of charge due to differences in electronegativity between bonded atoms. It is a vector quantity, having both magnitude and direction.

2. **Analyzing CO₂ (Carbon Dioxide)**:
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