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Alcatuieste formulele substantelor dupa valenta indicata si calculeaza masele molare: HO. HS. NH. PH.HCI

Răspuns :

Natasa1988

H(I) si O (II) => H2O   ==> MH2O = 2AH + AO =2*1+16=18g/mol

H(I) si O (II) => H2S ==> MH2S = 2AH + AS =2*1 + 32= 34g/mol

N(III) si H(I) => NH3 ==> MNH3 = AN+3AH=14+3*1=17g/mol

P(III) si H(I) => PH3 ==> MPH3 = AP+3AH=31+3*1=34g/mol

H(I) si Cl(I) => HCl ==> MHCl =AH + ACl = 1+35,5=36,5g/mol

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