user avatar
user avatar
user avatar
Ivan Neretin
  • Member for 6 years, 11 months
  • Last seen this week
  • Moscow, Russia
163 votes
Accepted

Why is absolute zero unattainable?

51 votes

Has a carbon compound ever been found having an ionic bond?

46 votes
Accepted

What does the circle inscribed in a benzene ring represent?

41 votes

Is there radioactivity at absolute zero?

39 votes

Does the mass of sulfur really decrease when dissolved in water and increase when burnt?

38 votes
Accepted

What happens to a molecule while it is reacting?

35 votes

How does water evaporate completely when at room temperature?

29 votes
Accepted

Why is the melting point of PCl3 less than that of PCl5?

29 votes

How can brass still be made even though the crystal structures of zinc and copper are not the same?

25 votes
Accepted

Gaseous metals?

25 votes

What happens when an electron in a metal is excited?

25 votes
Accepted

Why is sulfur hexafluoride more stable than selenium or tellurium hexafluoride?

24 votes

Can single molecules of C and O2 react in isolation, and if so how will momentum be conserved?

22 votes

What is the strongest oxidising agent?

22 votes
Accepted

Why is the buckminsterfullerene the purest form of carbon?

21 votes

Why do we need the identity operator, E

21 votes

Does chemistry change under high voltage?

21 votes

Any substance too poisonous to measure an LD50?

21 votes

What are the crystals that have formed around the top of a conc. nitric acid bottle?

21 votes
Accepted

Why are protons more common than hydride ion?

20 votes

How do manufacturer remove oxygen from metal during melting?

20 votes

Does deuterated water slow down the overall metabolism of a cell?

19 votes
Accepted

Why is the standard enthalpy of formation of black phosphorus not zero?

19 votes
Accepted

Why do methane molecules have 15 degrees of freedom?

19 votes

Why CCl4 does not dissolve in water while SiCl4 does?

19 votes
Accepted

What is the smallest molar volume?

18 votes
Accepted

Shape of a wavefunction

17 votes
Accepted

Shape of sp³ hybrid orbital

17 votes
Accepted

Why don't heavy and light gases separate in the atmosphere?

17 votes
Accepted

Is iron the most stable element in the periodic table?

1
2 3 4 5
13