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4u-x%
16u-100%
x=4u*100%/16u
x=25%H
Stosunek masowy:
4:12=1:3
Stosunek atomowy:
4:1
mCH = 12u+1u*4
= 16u
16u - 100%
4u - x
16x - 400/:16
x=25% ---->wodór
12/4 = 3/1
Liczę na naj :p