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Cum transform 10 grame Hidrogen in moli , litri si molecule?

Răspuns :

MH2=2AH=2*1=2g/mol

mH2=10g

n=m/M=10/2=5 moli H2

n=V/Vm=>V=n*Vm=5*22,4 = 

1 mol H2......................NA=6,023*10^23 molecule
5 moli H2...........................x molecule

x=6,023*5*10^23 molecule

NA - nr lui Avogadro

n(niu) - nr de moli

A - masa atomica

M(miu)-masa molara, g/mol

m - masa, g

V - Volumul, L

Vm - Volmul molar = 22,4L in (c.n)