Answers

2016-07-11T18:47:54+08:00
Five counting numbers 3,6,9,12,15
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2016-07-11T20:02:06+08:00
In terms of its constituent elements, the mantle is made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium. There's also iron, aluminum, calcium, sodium, and potassium
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