The nuts, bolts, and hinges that attach some gates to a playground fence can be made of iron. the iron can react with oxygen in the air. the unbalanced equation representing this reaction is shown below.
(s) + (g) → (s)
62 balance the equation in your answer booklet for the reaction, using the smallest whole-number coefficients. [1]
63 determine the change in oxidation state for oxygen in this reaction. [1]

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

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

Calculate the standard enthalpy of formation of liquid methanol, ch3oh(l), using the following information: c(graphite) + o2 latex: \longrightarrow ⟶ co2(g) latex: \delta δ h° = –393.5 kj/mol h2(g) + o2 latex: \longrightarrow ⟶ h2o(l) latex: \delta δ h° = –285.8 kj/mol ch3oh(l) + o2(g) latex: \longrightarrow ⟶ co2(g) + 2h2o(l) latex: \delta δ h° = –726.4 kj/mol