Nᴀ-число Авогадра
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1)Mr(O₂)=32
m(O₂)=Mr/Nᴀ=
32/6,02×10²³=5,3×10¯²³г
=5,3×10¯²⁶кг
2)Mr(CO₂)=44
m(СO₂)=Mr/Nᴀ=
44/6,02×10²³=7,3×10¯²³г
=7,3×10¯²⁶кг
3)Mr(H₂O)=18
m(H₂O)=Mr/Nᴀ=
18/6,02×10²³=3×10¯²³г
=3×10¯²⁶кг
4)Mr(NH₃)=17
m(NH₃)=Mr/Nᴀ=
17/6,02×10²³=2,8×10¯²³г
=2,8×10¯²⁶кг