Which reaction represents the enthalpy of formation? which reaction process represents electron affinity? which reaction represents ionization energy? (answers must be in correct order, as they are asked.) i. br(g) + e−  br−(g) ii. br2(g)  2br(g) iii. na(g)  na+(g) + e− iv. na(s) + br(l)  nabr(s) v. na(s) +1/2 br2(l)  nabr(s)

How much energy moves onto the next level, in an energy pyramid

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted