wapń + tlen = tlenek wapnia
20g + xg = 28g
x = 28g - 20g
x = 8g tlenu
mCa : mO = 20 : 8
mCa : mO = 5 : 2
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wapń + tlen = tlenek wapnia
20g + xg = 28g
x = 28g - 20g
x = 8g tlenu
mCa : mO = 20 : 8
mCa : mO = 5 : 2