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122u--------100%
28u----------x
28u*100%
x=_________
122u
x≈23%
mNa4SiO4= 4*23u+28u+4*16u=188u
188u---------100%
28u-----------x
100%*28u
x=_________
188u
x≈15%
15%<23%
odp:Na4SiO4 ma większą zawartośc krzemu. :)