1.What is the function of light in the reaction of propane with elemental bromine?

A phase-distribution measurement was made for the PEG 3400–dextran T40–water system at 4oC. The following results give the starting composition and the equilibrium compositions of the two resulting phases, all in wt%.Use the Diamond–Hsu method of (8-93) to compute the values of Ai for dextran and PEG. Use those values to produce a tie line with one end at 11.19 wt% PEG in the top phase.

Please answer correctly b/c last time it was wrong When zinc metal reacts with oxygen gas, 2Zn(s) + O2(g) → 2ZnO(g), large amounts of light and heat are released. A student states that this reaction is a combustion reaction but not a redox reaction. Do you agree? Defend your answer by explaining whether or not it meets the requirements of each type of reaction.

Demonstrate the atomic species balances for the answers, and demonstrate the molecular species balances for the answers.  Do not use the extent of reaction.