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Cu) 97u - 100%
63u - x x = 63u*100%/97u = 64,94%
O) 97u - 100%
32u - x x = 32 * 100/97 = 32,98%
H) 97u - 100%
2 u - x x = 2 * 100/97 = 2,06%
Stosunek masowy:
Cu:O:H
63:32:2