Chemistry, 12.08.2019 23:30 ghlin96

The thin outer layer of earth, called the crust, contains only 0.50 percent of earth's total mass and yet is the source of almost all the elements (the atmosphere provides elements such as oxygen, nitrogen, and a few other gases). silicon (si) is the second most abundant element in earth's crust (27.2 percent by mass). calculate the mass of silicon in kilograms in earth's crust (mass of earth 5.9 x 10^21 tons; 1 ton= 2000lb; 1lb =453.6 g).

Answers: 3

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 06:00

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Answers: 1

Answer

Chemistry, 22.06.2019 11:50

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?

Answers: 3

Answer

Chemistry, 22.06.2019 20:30

Consider the following unbalanced equation for the combustion of hexane: αc6h14(g)+βo2(g)→γco2(g)+δh2o(g) part a balance the equation. give your answer as an ordered set of numbers α, β, γ, use the least possible integers for the coefficients. α α , β, γ, δ = nothing request answer part b determine how many moles of o2 are required to react completely with 5.6 moles c6h14. express your answer using two significant figures. n n = nothing mol request answer provide feedback

Answers: 2

Answer

Chemistry, 23.06.2019 01:00

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.

Answers: 3

Answer

You know the right answer?

The thin outer layer of earth, called the crust, contains only 0.50 percent of earth's total mass an...

Questions