13. earth's surface area is 5.1 x 10^8 km², its crust has an average thickness of 35 km and an average density of 2.8 g/cm'. the two rarest (non-radioactive) elements in the crust are ruthenium and rhodium, each with an abundance of 1.0 x 10g/metric ton crust. what is the total mass of these two elements in the earth's crust? (1g = 1 x 10 metric ton)
Answers: 2
Chemistry, 22.06.2019 06:10
How many moles of gas are present if p=11 atm, v=12l, t=185k?
Answers: 1
Chemistry, 22.06.2019 20:00
Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.
Answers: 2
Chemistry, 23.06.2019 02:00
As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave
Answers: 2
13. earth's surface area is 5.1 x 10^8 km², its crust has an average thickness of 35 km and an avera...
Mathematics, 12.02.2020 01:40
Biology, 12.02.2020 01:40
Mathematics, 12.02.2020 01:40
Mathematics, 12.02.2020 01:40
Mathematics, 12.02.2020 01:40