One mole methane combusts to form one mole CO2 and 2 moles H2O
1. different gases mix together to form air and no new comound is formed
2. air has variable composition
3. air shows the properties of its constituent substances
Answer:
Energy added: particles move faster and further apart, and matter expands (state changes from solid to liquid to gas). Energy removed: particles move slower and closer together, and matter contracts (state changes from gas to liquid to solid).
Explanation:
Answer:
C
Explanation:
The battery is chemical energy. When it is used in the flashlight, it produces light and thermal energy
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