Students must answer this question in full. Show all logic, equations, values, units and sig figs. Melamine (C3N3(NH2)3) is a component of many adhesives and resins and is manufactured in a two-step
process from urea (CO(NH2)2) as the sole starting material. How many moles of urea would be required if we
want to collect 1.00 kg of melamine and if the first step in the process is 100% yield, but the second step is only
65% yield?
(1) CO(NH2)2 (1) ► HNCO(1) + NH3(g) (balanced)
(2) HNCO(1) → C3N3(NH2)3 (1) + CO2(g) (unbalanced)