What mass of melamine, c3n3(nh2)3, will be obtained from 170.5 kg of urea, co(nh2)2, if the yield of the overall reaction is 77.0 % ?

The balanced chemical reaction is:

CO(NH2)2(l) → HNCO(l) + NH3(g) 
6 HNCO(l) →= C3N3(NH2)3(l) + 3 CO2(g) 

(170.50 kg CO(NH2)2) / (60.0553 g CO(NH2)2/mol) x (1 mol HNCO / 1 mol CO(NH2)2) x 
(1 mol C3N3(NH2)3 / 6 mol HNCO) x (126.1199 g C3N3(NH2)3/mol) x (0.770) = 45.95 kg C3N3(NH2)3

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)