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f) 46+32+64=142u
g)28+8+12+32=80u
h)72+62+128=262u
i)2+32+64=98u
Zad2
78u=2*(46u/2)+x
x=78u-46u
x=32u
32u-Siarka
46u/2=23u
23u-Sód
wzór: Na2S