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mNa=23u
mNaOH=40u
mNa₂O=62u
40g NaOH ----- 23g Na
20g NaOH ------ xg Na
x = 11,5g Na
62g Na₂O ----- 2*23g Na
xg Na₂O -------- 11,5g Na
x = 15,5g Na₂O
18)
mCO=28u
28g CO ----- 22,4dm³
89g CO ------ x dm³
x = 71,2dm³
22,4dm³ ----- 6,02*10²³ cząst. CO₂
71,2dm³ ------ x cząst. CO₂
x = 19,135*10²³ cząst. CO₂