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Dobrý deň. Potrebovala by som poradiť s týmto príkladom. Pri zaváraní uhoriek sa používa 4,5 % roztok kuchynskej soli. Ako pripravíme 2 kg tohto roztoku ?
Vypočítajte, aký objem vodíka sa uvoľnil pri reakcii 1g sodika s etanolom za normálnych podmienok a ako ste dokázali jeho prítomnosť
1. Vypočitajte vyťažok kryštalizacie, ak 900g roztoku chloridu draselneho pri teplote 75 ochladime na 0. Rozpustnosť chloridu draselneho pri teplote 75 je 50g v 100g vody a pri teplote 0 je 26g v…
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