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7. Вычислите молярную массу: 1) М(СН4)= 2) M(NH3)= 3) М(С02) 4) M(HN03)= 5) М(Н3Р04)= 6) M(Fe304)= 7) M(KMn04)= 8) M(S03)= 9) M(N205)=
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