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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

0%

90%

4%

0%

42

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9%

76%

14%

0%

21

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6%

75%

15%

2%

648

Poland

6%

74%

14%

3%

4372

the Netherlands

3%

73%

20%

3%

30

the United Kingdom

6%

72%

16%

3%

257

the United States

8%

70%

14%

3%

415

Pakistan

11%

70%

12%

3%

86

Australia

6%

69%

22%

1%

83

France

5%

65%

25%

5%

20

the United Arab Emirates

4%

58%

12%

16%

24

Canada

8%

55%

30%

3%

60

Nigeria

12%

53%

32%

2%

131

Malaysia

14%

53%

28%

3%

28

Germany

6%

51%

33%

5%

946

Ghana

16%

51%

16%

12%

31

Italy

11%

44%

40%

3%

27

Austria

6%

42%

38%

10%

147

the Philippines

27%

40%

16%

11%

61

Switzerland

4%

36%

48%

10%

83

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