Koliko grama natrijum-hlorida i koliko grama vode treba pomiješati da bi se dobilo 200 g 15% rastsvora NaCl?
Katarina B.
15g NaCl:100g R = x g NaCl:200g Rx=30 g NaCl.
200 g R - 30 g NaCl= 170 g H2O. :)
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Katarina B. 15g NaCl:100g R
Katarina B.
15g NaCl:100g R = x g NaCl:200g R
x=30 g NaCl.
200 g R - 30 g NaCl= 170 g H2O. :)