Question

помогите пжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжпжпжпжпжпжпжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжж

Answer 1

3.
K2O >>> K(I) , O(II)
SO2 >>> S(IV) , O(II)
P2O3 >>> P(III) , O(II)
ZnBr2 >>> Zn(II) , Br(I)
NH3 >>> N(III) , H(I)
Na2S >>> Na(I) , S(II)
4.
CF4 , Al2O3 , CuBr2 , SO2 , CrO3 , Cl2O7 , CaS
5.
Формула Al2O3
Mr(Al2O3) = 27×2 + 16×3 = 102

W(Al) = (27×2 : 102) × 100% = 52,94%
W(O) = 100 - 52,94 = 47,06%