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62g=100%
12g C- x
x=19,35%
2
n2o=44g
28g n=x%
44-100%
x= 63,63%
3
5,6 g fe-xg s
112-96g S
x=4,8 g S
4g s -xg fe
96 g s -112 g fe
x=4,6 g
w niedomiarze uzyto siarki
4g s -x g fe2s3
96-208
x= 8,6(7)g fe2s3