negrusadevarat69 negrusadevarat69

27-06-2024
Mathematics

Answered

In doua eprubete se afla soluții (apa+sare).Concentratia soluției din prima eprubeta este de 0,5,iar cea a soluției din a doua eprubeta este 0,7.Se amesteca 7l de solutie din prima eprubeta cu 5l din a doua.Calculati concentrația noii soluții.

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