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MNH4OH=14+5+16=35g
35g - 100%
14g - x
x=14g x 100%/35g=40%
35g-------100%
14g--------x
x=40%
zawartosc procentowa azotu w zasadzie amonowej wynosci 40%
35g=100%
14g=x
35x=100%*14
35x=1400%
x=1400%/35
x=40%