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0,5 - 100%
x - 21 %
x = 0,5 * 21 / 100
x = 0,105 dm3
W czasie 1 oddechu człowiek wdycha 0,105 dm3 tlenu.
Pozdro :P
x-21%
x=0,105dm³
0,105dm³ tlenu
chyba tak;)