Earth's surface area is 5.10 ร 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 ร 105 g/t) and silicon (2.72 ร 105 g/t), and the two rarest non-radioactive elements are ruthenium and rhodium, each with an abundance of 1 ร 10โ4 g/t. what is the total mass of each of these elements in earth's crust? 1 metric ton (t) = 1,000 kg.
Answers: 1
Chemistry, 22.06.2019 01:00, deaishaajennings123
What is the equilibrium constant of aa+bb=cc+dd
Answers: 1
Chemistry, 22.06.2019 22:00, jlegrand9098
4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.
Answers: 2
Earth's surface area is 5.10 ร 108 km2, and its crust has a mean thickness of 35 km and mean density...
History, 19.07.2019 04:00
History, 19.07.2019 04:00