Answer:
Physical
Explanation:
Olive oil, vinegar, salt, and pepper are shaken together to make salad dressing. Physical or chemical change?
Physical
Chemical potential energy
Answer:
If a metal is less reactive than carbon, it can be extracted from its oxide by heating with carbon. The carbon displaces the metal from the compound, and removes the oxygen from the oxide. This leaves the metal.
2 C8H18 + 25 O2 = 16 CO2 + 18 H2<span>O
Above is properly balanced but as you want 1 mole. divide everything by 2
</span>C8H18 + 12.5O2 = 8CO2 + 9H2<span>O</span>