Oblicz ile gramopw wody trzeba dolac aby z 400 g roztworu 10% otrzymac roztwor 8 %
400g 10% ................... 8-0=8
......................8%
xg 0% ....................... 10-8=2
400/x = 8/2
8x = 400*2
8x = 800
x = 100g wody
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400g 10% ................... 8-0=8
......................8%
xg 0% ....................... 10-8=2
400/x = 8/2
8x = 400*2
8x = 800
x = 100g wody