mN:mO=7:20/*4
28:80
mN=14 u
mO=16 u
28u:14u=2 atomy N
80u:16u=5 atomów O
Wzór: N2O5
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mN:mO=7:20/*4
28:80
mN=14 u
mO=16 u
28u:14u=2 atomy N
80u:16u=5 atomów O
Wzór: N2O5