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.................... 40%
xg 100% .................. 40-20 = 20
60x = 400*20
60x = 8000
x = 133,3g soli
Cp1=20%
Mr=400g
20%=ms/400g *100%
ms=80g NaNO3
Cp2=40%
Cp2=ms'/mr' *100%
40%=80g +x/400g+x *100%
40x+16000=8000+100x
60x=8000
x=133,(3)g NaNO3 tyle należy dodać