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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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Republic of Ireland

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4%

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21

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17%

3%

29

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4300

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15%

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646

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72%

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3%

253

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12%

3%

86

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3%

403

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23%

1%

82

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65%

25%

5%

20

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12%

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24

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55%

30%

3%

60

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32%

2%

131

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28%

3%

28

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51%

16%

12%

31

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5%

926

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44%

40%

3%

27

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38%

10%

147

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61

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4%

36%

47%

10%

82

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