Nieaktywny
2.6.2018 (21:32)
1)
Cp = ms / mr *100% = ms/(mw+ms) * 100 % = 10g/(10g+190g)*100% = 5%
2)
ms = Cp1 * mr1 / 100%
Cp2 = ms /(mr2)*100% = ms/(mr1 + mw2) *100%= (Cp1*mr1 / 100%) /(mr1 + Vw2 * dw)*100% [Procenty się skracają ;) ]
Cp2 = (Cp1*mr1)/(mr1+Vw2*dw) = 15% *200g / (200g + 100cm3 * 1g/cm3) = 15% * 200g / (200g+100g) = 15% * 200g/300g = 15%*2/3 = 10%
3)Cn = n/V ; n=m/M; m=5g, M = (23+16+1)g/mol
Cn = m/(M*V) = 5g/( 40g/mol * 0,5 L ) = 5/20 mol/L = 0,25mol/L
Przydatne rozwiązanie?
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