Question

Massa molecular calcule :
a) C6H4 (CO2H)2
b) C6H3 (NO2) 2
c) (CH2)2 CH (5H)2 OH
d) C12 H18 On4 Scl2

Answer 1

C= 12 H=1 O=16 N=14 CL= 35 S=32 CO=59

A) 6×12 + 4×1 + 59×4 + 1×2= 72+4+236+2=314g/mol 

B) 12×6 + 1×3 + 14×2 + 16×4= 72+3+28+64=167g/mol

C) 2×12 + 4×1 + 12 + 1 + 10 + 16 +1= 24+4+12+11+16=67g/mol

D) 12×12 + 18 + 16 + 14×2 + 32 + 35×2= 144+18+16+28+32+70=308g/mol