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It is just based on the fact that they are closer or further away from the Sun.
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Answer: Aluminium
Explanation: Aluminium metal has a lower density than copper. So, for the same volume of metal used to build a model airplane, the aluminium plane would be very lightweight while that of copper would be heavy. The lightweight airplane will fly easily.
Answer: The layers are ordered by density, with the least dense layer on top, and the densest layer on the bottom.
Explanation:
Plato
Answer:
fijhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
Explanation:
Answer:
114 grams
Explanation:
3chlorines per compound*38grams=114
