Question

100 g apa de brom 1.6% se
decoloreaza cu o cantitate de etena de:

Answer 1

ms = 100 g

c% = mdx100/ms

=> md = msxc%/100

= 100x1,6/100 = 1,6 g Br2

m g       1,6 g

C2H4 + Br2 => C2H4Br2

28        2x80

=> m = 0,28 g etena

=> niu = 0,28/28 = 0,01 moli etena