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9. mSn(OH)₂=119u+2*16u+2*1u=153u odp.C
10. C
2.B
12.
K₂O+H₂O--->2KOH
BaO+H₂O--->Ba(OH)₂
13.
a) wodorotlenek miedzi(II)
b) wodorotlenek glinu
c) Cr(OH)₃
d) NaOH