Question

Ma puteti ajuta la 41 si 43?? dau coroana​

Answer 1

Răspuns:

Buna:-)

Ex 44)

nFe=4

nO2=?

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mFE=nAFE=4 ori56=224g

mFE=mO2=224 sunt egale

mO2=2 ori16=>32

nO2=m/M=m:M=224/32=224:32=7 moli

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Ex 43)

a) 1 mol Zn are masa egala cu 65 g si stim ca acesta contineb6,023 ori 10 la puterea 23 atomi

AZn=65g/mol

NA=6,023 ORI 10 la puterea 23 moli/atomi

B) 1 mol Ag=6,023 ori 10^23atomi=108gAg

30,11 ori 10^23atomi=X Ag

X=30,11 ori 10^23

X=539,91g Ag