24. Solving a chemistry problem
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24. Solving a chemistry problem
6. How many grams of K2Cr2O7 should be taken to prepare 250 ml of a solution with a molar equivalent concentration of 0.02 mol/l?
Cr2O72- … → Cr3 H2O
a) 0.0050; b) 0.1225; c) 0.2450.
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