Oblicz masę cząsteczkową tych pierwiastków :
a) tlenek siarki (6)
b) tlenek chlorku (7)
c) chlorek glinu (3)
d) cynk miedzi (2)
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a. SO3
mS= 32u
mO= 16u
m= 32u + 3*16u = 32u + 48u= 80u
b. Cl2O7
mCl = 35
mO = 16
m= 2*35u + 7*16u= 70u + 105u = 175u
c. AlCl3
mAl = 27
mCl = 35
m = 27u + 3*35u = 27u + 105u = 132 u