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3HBrO3,
3 atomy H
3 atomy bR
9 atomÓW O
3HCl,
3 atomy H
3 atomy Cl
H3PO4,
3 atomy H
1 atom P
4 atomy O
2H2CrO4.
$ atomy H
2 atomy Cr
8 atomów O