Dobrý večer, chcela by som sa opýtať či by ste mi nevedeli pomôcť ako mám postupovať pri výpočte nasledujúcich príkladov:
1. Koľko O sa uvoľní pri rozklade 50g peroxidu vodíka?
2. Chceme zriediť 40% NaCl s hmotnosťou 20g na 15%.
3. Koľko reaktantov treba na výrobu 10g chloridu zinočnatého?
Vopred ďakujem
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