Earth's surface area is 5.10 × 108 km2, and its crust has a mean thickness of 35 km and mean density of 2.8 g/cm3. the two most abundant elements in the crust are oxygen (4.55 × 105 g/t) and silicon (2.72 × 105 g/t), and the two rarest non-radioactive elements are ruthenium and rhodium, each with an abundance of 1 × 10−4 g/t. what is the total mass of each of these elements in earth's crust? 1 metric ton (t) = 1,000 kg.
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Earth's surface area is 5.10 × 108 km2, and its crust has a mean thickness of 35 km and mean density...
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