R-NH2 + HBr = R-NH3Br
n(R-NH2)=0,56/22,4=0,025 моль
n(R-NH2)=n(NH3Br)=0,025 моль
M(R-NH3Br)= 3,5/0,025 = 140
M(R) = 140 - 14- 3 - 80 = 43
M(R)= (CnH2n+1) = 43
12n+2n+1=43
14n=42
n=3; формула амина- C3H7NH2
R-NH2 + HBr = R-NH3Br
n(R-NH2)=0,56/22,4=0,025 моль
n(R-NH2)=n(NH3Br)=0,025 моль
M(R-NH3Br)= 3,5/0,025 = 140
M(R) = 140 - 14- 3 - 80 = 43
M(R)= (CnH2n+1) = 43
12n+2n+1=43
14n=42
n=3; формула амина- C3H7NH2