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IGGYboy
a fost răspuns

Calculeaza masele moleculare relative ale substantelor :
a)H2,N2,O2,F2;
b)Cl2,Br2,l2.
Numeste aceste substante

Răspuns :

Lupuirina
H2-hidrogen=1*2=2u.a.m(unitati atomice molare)
N2-azot=14*2=28u.a.m
O2-oxigen=16*2=32u.a.m
F2-fluor=19*2=38u.a.m
Cl2-cor=35,5*2=71u.a.m(unicul element care se ia cu tot cu intreg adica 35,5)
Br2-brom=80*2=160u.a.m
I2-iod=127*2=254u.a.m
Wizard48
H₂=1*2=2g/mol
N₂=14*2=28g/mol
O₂=16*2=32g/mol
F₂=19*2=38g/mol
Cl₂=35,5*2=71g/mol
Br₂=80*2=160g/mol
I₂=127*2=254g/mol

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