Which of the following electron configurations of neutral atoms represent excited states?

( a) [xe]6s24f1
( b) 2s2
( c) 1s22s22p63s23p63d2
( d) [ar]4s23d3
(e ) [kr]5s14d5

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