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Sa se calculeze numarul de molecule aflate intr-un metru cub de halou. (He).. Ajutoor!!

Răspuns :

1m3=1000L

n=V/Vm=1000/22,4=44,6428571 moli He

1 mol He.....................6,022*10^23 molecule
44,6428571 moli He...........x=268,839*10^23 molecule