Jawabanmu

2014-06-12T13:11:12+07:00
M=14.2
v=4.48
vm=22.4 krn STP
n= v/vm
  = 4.48/22.4
  = 0.2
mr = m/n
     = 14.2/0.2
     = 71 
jadi jawabnya yg D :)
2014-06-12T20:58:06+07:00
Mol = 4,48/22,4
= 0,2
mr = 14,2/0.2
= 71