Give examples of solid-liquid, solid-gaseous, liquid-gaseous substances?

Gaseous substances:
– О₂ – oxygen
– Н₂ – hydrogen
– СО₂ – carbon dioxide

liquid substances:
– Н₂О – water
– С₂Н₅ОН – alcohol
– H₂SO₄ – sulfuric acid

Solids
Fe – iron
Al – aluminum
Ar – silver

Amphoteric substances
-C₄₀H₆₂N₁₀O₁₂ – protein
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