Tag: atmospheric-chemistry

physical chemistry – Why don’t gases escape Earth’s atmosphere?

The Question : 30 people think this question is useful Some gases are lighter than others and rise. Why don’t they continue going up, leave the atmosphere, and then enter outer space? The Question Comments : Related: physics.stackexchange.com/q/202138/17547 Related: earthscience.stackexchange.com/questions/736 They did. All the helium ad hydrogen gone from the atmosphere and keep escaping nowadays,

environmental chemistry – How much CO2 could you remove from the atmosphere with 2 trillion USD?

The Question : 33 people think this question is useful I know it’s possible to capture $\ce{CO2}$ with various chemical reactions. For example NASA’s space shuttle had some kind of regenerative $\ce{CO2}$ scrubber. But how expensive is it? Could a huge number of these devices, or something like it, significantly reduce the atmosphere’s $\ce{CO2}$ level?

radioactivity – What happens to a radioactive carbon dioxide molecule when its carbon-14 atom decays?

The Question : 48 people think this question is useful When carbon-14 decays, the decay products are nitrogen-14 and an electron (and an electron antineutrino, but that’s chemically irrelevant*): $$\ce{^14_6C -> ^14_7N + e- + \overline{v_e}}$$ Let’s assume that the carbon atom in question is part of a carbon dioxide molecule in the atmosphere. What