Earths surface area is 5.10 108 km2 , and its crust has a
Chapter 1, Problem 1.91(choose chapter or problem)
Earths 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/ metric ton, t) and silicon (2.72 10 5 g/t), and the two rarest nonradioactive 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 Earths crust (1 t 1000 kg)?
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