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calculati masa de piatra vanata, CuSO4*5H20, care trebuie sa se adauge la 200g solutie CuSO4 de concentratie procentuala 5%, astfel incat concentratia solutiei sa se dubleze

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Nudh bro cauta pe alt siter is a great place to work for and I am very excited to have the chance of having to be able and to have some fun in this game for the car or a place that is available in my area of interest to the next year or so to be able and able for the best for me to do so