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30g HCHO-------1mol
36g HCHO---------x
x = 1,2 mola
1,1g r-ru----------------1cm3
100g r-ru---------------x
x = 90,91cm3
1,2 mola------90,91cm3
x mola---------2000cm3
x = 26,4 mola HCHO
1 mol-----------22,4dm3
26,4mola---------x
x = 591,36dm3 HCHO należy użyć