1. n1 moli C2H4 + H2 ⇒ C2H6
n2 moli C4H8 +H2 ⇒ C4H10
28n1 +56n2 = 140 n1 + 2n2 = 5 n1/n2 = 3/2 n1= 1,5n2
3,5n2 = 5 n2=5/3,5 = 10/7moli butena n1=15/7 moli etena
Δm = mH2 reactionat = n1xηx2 + n2x0,75x2 = 2n1xη+ 1,5n2 = 3,9
30/7 x η + 15/7 = 3,9 30xη = 12,3 η = 0,41 = 41%
2. m dopamina = 3·50 = 150mg
solutia de perfuzie : Vs = 250ml m dopamina = 150mg c=150/250= 0,6mg/ml
doza necesara = 50·50 = 2500micrograme/minut = 2,5mg
1 minut...................................2,5mg
T............................................150 mg T = 150/2,5 = 60min = 1 h