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Which gas is called laughing gas?

ammonia

nitrous oxide

nitrogen dioxide

sodium oxide

Nitrous oxide (N2O), more commonly referred to as laughing gas, is used as a local sedation method, according to the California Dental Association (CDA). Nitrous oxide is effective as a sedative because it relaxes patients with the pleasurable feelings it emits. Nitrous oxide's usefulness also stems from how quickly it works and that its effects are reversible.

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Michael Coghlan wikipedia → Nitrous oxide

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21

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4247

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252

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401

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82

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19

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24

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60

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131

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28

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31

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146

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80

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