19. Lithium reacts spontaneously with bromine to produce lithium bromide. 2Li(s) + Br2(l)-► 2LiBr(s). 1f l25.0
g of lithium and 25.0 g of bromine are present at the beginning of the reaction determine the excess mass of the excess reactant.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

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