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22,4dm3 ---- 4*6,02*10²³at.
x=12,04*10²³at
18g ---- x
180g ---- 12*6,02*10²³at
x= 7,224*10²³ at
a) CH₄
0,05mol ---- x
1mol ------- 5*6,02*10²³at
x=1,505*10²³at
2,8dm³---- x
22,4dm³ --- 3*6,02*10²³at
x= 2,2575*10²³at
b)NH₃