During the last 5 million years, how often have the poles reversed themselves? 10

20

15

5
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How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

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

At element makes up all organic compounds?