Which gas can extinguish burning candle?
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The gas that can extinguish a burning candle is carbon dioxide (CO2). When carbon dioxide is introduced near a burning candle, it displaces the oxygen (O2) in the surrounding air. Since combustion (burning) requires oxygen as one of its essential components, the reduced oxygen concentration caused by the presence of carbon dioxide can lead to the extinguishing of the flame. This is why carbon dioxide is often used in fire extinguishers to put out fires.