User matt_black

81 votes

Why can a diamond be broken using a hammer if it's the hardest natural substance known?

answered Oct 15, 2018 at 13:23

60 votes

Accepted

Is carbon dioxide organic or inorganic?

answered Dec 30, 2014 at 13:50

43 votes

Accepted

Why doesn't NASA or SpaceX use ozone as an oxidizer for rocket fuels?

answered Dec 19, 2020 at 23:19

40 votes

Why is chemistry unpredictable?

answered Oct 19, 2020 at 20:02

35 votes

Why does mercury decolourise a gold ring?

answered Jun 25, 2017 at 9:58

34 votes

Accepted

Why is snow white?

answered Feb 28, 2015 at 18:49

33 votes

Is it actually possible to dispose of a body with hydrofluoric acid?

answered Dec 23, 2013 at 15:30

33 votes

Accepted

How could the ideal gas law be discovered from experiments on real gases?

answered Feb 13, 2019 at 11:47

31 votes

Why does a 57.15% ABV spirit (ethanol+water) have a density of 923 kg per cubic meter?

answered Feb 8, 2021 at 10:26

29 votes

Accepted

How to determine number of structural isomers?

answered Mar 28, 2015 at 12:26

28 votes

Accepted

Why do some chemical reactions require many steps?

answered Jun 19, 2018 at 12:21

26 votes

Difference between Sildenafil and Sildenafil citrate

answered Oct 30, 2017 at 15:54

24 votes

Why are Silicates solid while carbon dioxide is a gas?

answered Aug 1, 2017 at 23:28

23 votes

Accepted

Is water a possible fuel for jet engines?

answered Sep 20, 2017 at 17:16

22 votes

Accepted

Toxicity of metallic lead (Pb)

answered Dec 3, 2016 at 11:31

22 votes

What makes substances explosive

answered Jan 9, 2014 at 22:34

22 votes

Accepted

Is activation energy temperature-independent?

answered Jan 27, 2016 at 18:22

21 votes

Accepted

Why do diamond and graphite have different structures, when they are both composed of carbon?

answered Mar 19, 2018 at 12:30

21 votes

What is the purpose of a boiling stick when heating a reaction mixture?

answered Mar 20, 2018 at 10:55

21 votes

Why did life end up with the big 4 elements, and specifically nitrogen?

answered Jan 23, 2020 at 12:18

21 votes

Accepted

Does a smell imply particles or chemicals in the air?

answered Dec 3, 2018 at 13:13

21 votes

Why is potassium ferrocyanide considered safe for consumption, when it is just one reaction away from the highly toxic potassium cyanide?

answered Nov 6, 2019 at 10:03

20 votes

In a saturated solution, why is there ongoing dissolution and crystallisation?

answered Nov 19, 2018 at 12:59

20 votes

Why are the boiling points of aldehydes less than those of ketones?

answered Feb 19, 2014 at 21:40

19 votes

Accepted

Mercury metal: Not toxic?

answered Oct 20, 2016 at 21:11

19 votes

Are all volatile liquids combustible?

answered Sep 3, 2019 at 10:38

19 votes

Accepted

If LPG gas burners can reach temperatures above 1700 °C, then how do HCA and PAH not develop in extreme amounts during cooking?

answered Sep 29, 2019 at 21:34

19 votes

Accepted

Does all fire only emit light on its outermost shell?

answered Apr 9, 2021 at 15:39

18 votes

Why do branched chain compounds have lower boiling points than the corresponding straight chain isomers?

answered Dec 31, 2013 at 1:32

18 votes

Bonding between rings and iron atom in ferrocene

answered Sep 20, 2015 at 21:18

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526 Answers

Why can a diamond be broken using a hammer if it's the hardest natural substance known?

Is carbon dioxide organic or inorganic?

Why doesn't NASA or SpaceX use ozone as an oxidizer for rocket fuels?

Why is chemistry unpredictable?

Why does mercury decolourise a gold ring?

Why is snow white?

Is it actually possible to dispose of a body with hydrofluoric acid?

How could the ideal gas law be discovered from experiments on real gases?

Why does a 57.15% ABV spirit (ethanol+water) have a density of 923 kg per cubic meter?

How to determine number of structural isomers?

Why do some chemical reactions require many steps?

Difference between Sildenafil and Sildenafil citrate

Why are Silicates solid while carbon dioxide is a gas?

Is water a possible fuel for jet engines?

Toxicity of metallic lead (Pb)

What makes substances explosive

Is activation energy temperature-independent?

Why do diamond and graphite have different structures, when they are both composed of carbon?

What is the purpose of a boiling stick when heating a reaction mixture?

Why did life end up with the big 4 elements, and specifically nitrogen?

Does a smell imply particles or chemicals in the air?

Why is potassium ferrocyanide considered safe for consumption, when it is just one reaction away from the highly toxic potassium cyanide?

In a saturated solution, why is there ongoing dissolution and crystallisation?

Why are the boiling points of aldehydes less than those of ketones?

Mercury metal: Not toxic?

Are all volatile liquids combustible?

If LPG gas burners can reach temperatures above 1700 °C, then how do HCA and PAH not develop in extreme amounts during cooking?

Does all fire only emit light on its outermost shell?

Why do branched chain compounds have lower boiling points than the corresponding straight chain isomers?

Bonding between rings and iron atom in ferrocene