Protium - the most common isotope of hydrogen - has no neutrons in its nucleus.
The answer is B) heat will flow from the water to the copper until they both reach the same temperature
2Al₂O₃ → 4Al + 3O₂
the mole ratio is 4:3
for every 4 Al, there must be 3 O₂ in order to make 2Al₂O₃
hope this helped at all
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Water is better at sticking together with other water molecules than it is with the "waxy surfaces".
