Respostas

2013-12-02T14:29:59-02:00
8 H2S  +  8 Cl2   →   S8   + 16 HCl

12 H3BO3   →    2 H4B6O11   + 14  H2O

2)  MM
C6H6 = 78 g /mol
C = 12 . 6 = 72 / 78 = 0,92
H = 1 . 6 = 6 /72 = 0,08

C92% H 8%

C12H22O11 = 342 g
C = 144 / 342 = 0,42
H = 22 / 342 = 0,07
O = 11 . 16 = 176 / 342 = 0,51

C42% H7% O51%