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m C₃H₇COOH=12u*4+1u*8+16u*2=48u+8u+32u=88u
C:O:H
48:32:8
6:4:1
mC : mO : mH = 4*12 : 2*16 : 8*1
mC : mO : mH = 48 : 32 : 8
mC : mO : mH = 6 : 4 : 1
Odp: Stosunek masowy węgla do tlenu do wodoru w kwasie butanowym wynosi 6:4:1. ;)