User matt_black

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Isotopes of Elements

answered Jan 3, 2019 at 14:12

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How are Uranium and such materials made

answered Jan 28, 2019 at 15:41

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Accepted

When styrofoam shrinks from pressure, why doesn't it go back to normal after decreasing the pressure?

answered Feb 6 at 10:08

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Where does the energy in coal bonds come from?

answered Aug 7, 2022 at 16:53

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Why does the vapour pressure not depend on the surface area and volume of a liquid?

answered Apr 10 at 16:19

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Why is the discovery of chiral molecules in space a big accomplishment?

answered Jun 15, 2016 at 20:53

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Do there exist metals that are composed of molecules?

answered May 9, 2016 at 13:16

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Why do steel and iron not passivate the way aluminum does?

answered Mar 23, 2016 at 15:13

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Dry ice and acetone

answered Feb 18, 2014 at 15:24

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What makes elements radioactive?

answered Feb 15, 2015 at 11:43

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How many molecules are there typically in items made of plastics?

answered May 10, 2015 at 11:02

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What exactly is happening when sodium, potassium, or other alkali metal explodes in water?

answered Nov 25, 2012 at 14:28

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Distilled water to clean greasy stains: Why does that work?

answered Jan 25, 2014 at 15:23

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Is there a hydrophobic gas?

answered Jan 18, 2014 at 12:46

7 votes

Does smoking drugs degrade them?

answered Nov 3, 2021 at 10:21

7 votes

Why did we introduce the concept of oxidation number in chemistry?

answered Apr 16, 2021 at 11:19

7 votes

How odorless is "odorless"?

answered Feb 16, 2022 at 10:05

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In the Gold Foil experiment, did Ernest Rutherford's alpha particles hit the same spot every time or did he direct the emitter to different spots?

answered Feb 20, 2021 at 14:31

7 votes

How to make elemental silicon?

answered Dec 19, 2019 at 13:39

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Raman transition and IR transition

answered Feb 8, 2019 at 13:47

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Why is graphite brittle?

answered Feb 9, 2019 at 23:22

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PVC reacting or self-decomposing?

answered Mar 18, 2017 at 16:58

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What is the meaning of n-Pr and i-Pr?

answered Apr 20, 2017 at 19:56

7 votes

How is chemical energy stored in carbon

answered Jun 19, 2017 at 22:55

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Why are gas laws only applicable to gases?

answered Oct 30, 2017 at 16:36

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Do non-ergodic chemical reactions exist?

answered Oct 15, 2017 at 20:19

7 votes

Does energy come from fuel or oxygen? (surprise?)

answered Jul 19, 2019 at 23:25

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Does a chiral allene have stereogenic centres?

answered Nov 9 at 17:40

7 votes

Why is Charcoal such an excellent adsorbent?

answered Jan 9, 2014 at 23:06

7 votes

Why is the maximum % for a gold alloy 92%?

answered Jan 31, 2014 at 21:04

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530 Answers

Isotopes of Elements

How are Uranium and such materials made

When styrofoam shrinks from pressure, why doesn't it go back to normal after decreasing the pressure?

Where does the energy in coal bonds come from?

Why does the vapour pressure not depend on the surface area and volume of a liquid?

Why is the discovery of chiral molecules in space a big accomplishment?

Do there exist metals that are composed of molecules?

Why do steel and iron not passivate the way aluminum does?

Dry ice and acetone

What makes elements radioactive?

How many molecules are there typically in items made of plastics?

What exactly is happening when sodium, potassium, or other alkali metal explodes in water?

Distilled water to clean greasy stains: Why does that work?

Is there a hydrophobic gas?

Does smoking drugs degrade them?

Why did we introduce the concept of oxidation number in chemistry?

How odorless is "odorless"?

In the Gold Foil experiment, did Ernest Rutherford's alpha particles hit the same spot every time or did he direct the emitter to different spots?

How to make elemental silicon?

Raman transition and IR transition

Why is graphite brittle?

PVC reacting or self-decomposing?

What is the meaning of n-Pr and i-Pr?

How is chemical energy stored in carbon

Why are gas laws only applicable to gases?

Do non-ergodic chemical reactions exist?

Does energy come from fuel or oxygen? (surprise?)

Does a chiral allene have stereogenic centres?

Why is Charcoal such an excellent adsorbent?

Why is the maximum % for a gold alloy 92%?