Do 200g 30% roztworu soli dodano 90g tej soli. Oblicz stężenie procentowe otrzymanego roztworu.
200g*30%+90g*100%=(200g+90g)x%
6000+9000=290x
15000=290x
x≈51,72[%]
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200g*30%+90g*100%=(200g+90g)x%
6000+9000=290x
15000=290x
x≈51,72[%]