5. For the reaction 2KIO,> 2KCI+ 30,, how many moles of potassium chlorate are required to produce 250 g of oxygen? a. 2.0 mol b. 4.3 mol c. 4.9 mol d. 5.2 mol 6.For the reaction 22n + 0, + 2Zno, how many grams of zinc oxide can be produced from 100. g each of zinc and oxygen? a. 100. g b. 124g c. 189g d. 200.g 7. For the reaction Cl,+ 2KBr 2KCI+ Br, calcul late the percent yield if 200. g of chlorine react with excess potassium bromide to produce 410. g of bromine. a. 73.4% b.82.1% c . 91.0% d. 98.9%