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Se dizolva 200 g alcool in 1800 g apa.Aflati concentratia procentuala a solutiei obtinute.​

Răspuns :

masa alcoolului=200g

masa H2O=1800g

masa solutiei=200g+1800g=2000g

concentratia procentuala a solutiei=200÷2000×100=10%