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Cat acid azotic si cata apa se gasesc in 120g solutie de concentratie 6,3%
AJUTOR!!!!!AM NEVOIE URGENT!!!!


Răspuns :

[tex]md=? \\ ms=120 \\ c=6,3 \\ \frac{md*100}{120} =6,3=\ \textgreater \ \frac{5*md}{6} =6,3 \\ =\ \textgreater \ 5md=37,8g=\ \textgreater \ md=7,56g \\ Mapa=ms-md=120-7,56=112,34g.apa[/tex]