Urea is manufactured on larg scale for use in producing urea formaldehyde plastics and as a fertilizer. what is the maximum mass of urea that can be manufactured from the co2 produced by the combustion of 1.00 x 103 kg of carbon followed by the reaction?
co2 + 2nh3 ? co(nh2)2 + h2o

Explanation:

There are two reactions taking place and the product of the first is a reactant at the other, so writing down the balanced chemical equations is the first step in determinimg the proportions

1)                                      C + O2 → CO2

1.Molar mass             C = 12.0107 g/mol              

2.Number of moles   of carbon has of C

Remember: mol(n)

2)                                     CO2 + 2NH3 → CO(NH3)2 + H2O

1.Molar mass             CO(NH3)2 = 60.02 g/mol      

2.Proportions              the urea syntheres has a proportion of 1:1 with carbon dioxyde, so there is of CO(NH3)2

of CO(NH3)2 has

6.4 cm (max) - 25 cm (min)

a is the correct answer