Odpowiedzi

2010-04-12T17:55:30+02:00
1. 30 kg - 2 %
x - 3 %

2x - 90
x = 45 kg

2. 10 kg - 5 %
x - 6%

5x - 60
x= 12 kg
2010-04-12T18:24:51+02:00
Zad. 1.
mr1 = 30 kg
Cp1 = 2 %
Cp2 = 3 %
ms1 = 2*30/100 = 0,6 kg
Cp2 = ms1*100%/mr2
mr2 = ms1*100%/Cp2
mr2 = 0,6*100/3
mr2 = 20 kg
mw2 = mr1 – mr2
mw2 = 30 kg – 20 kg
mw2 = 10 kg

Zad. 2.

Cp1 = 5 %
Cp2 = 6%
mr = x
mr2 = x – 10 kg
mw = 10 kg

a więc:
5%
0,05 x = 0,06 (x – 10) | * 100
5x = 6*(x – 10)
5x = 6x – 60
x = 60 kg