Cati atomi se gasesc in 10g H,He,Li,Na,K,P,Hg,Cl,I,Br,N?
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Răspunsuri la întrebare
M, H=1g/mol
n=m/M=10/1=10
10×6.023×10^23=60.23×10^23atomi H
M, He=2g/mol
n=10/2=5 mole He
5×6.023×10^23=30.115×10^23 atomi He
M, Li=3g/mol
n=10/3=3.3 mol
3.3x6.023×10^23= atomi Li
...
1mol hidrogen---------2.6,023.10²³ atomi H n=m:M=10g:2g/moli=5moli 1mol hidrogen----------------2.6,023.10²³ atomi H
5moli-----------------------------------x
x=2.5.6,023 .10²³ atomi H
10g Na
n=m:M =10g : 23g/moli
=0,43 moli Na
1mol Na----------6,023 .10²³ atomi Na
0,43 moli-------------y
y=0,43 .6,023.10²³atomi Na
10 g Clor MCl2=2.35,5=71----->1mol=71g
n=m:M=10g : 71g/mol=0,14 moli clor
1mol clor ----------2.6.023 .10²³atomi clor
0,14 moli--------------------z
z=2.0,14 .6,023.10²³atomi Cl
[ restul de atomi lucreaza dupa model] daca ai nelamuriri scrie!