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a)Ce cantitate de sulf exista in 320 g de acid sulfuric?
b)n=?


Răspuns :

Aflam masa molara a H2SO4=2. AH+1.AS+4.AO=2.1+1.32+4.16=98 g/mol
A=masa atomica
. =ori
98 g H2SO4..................32 g S
320 g H2SO4..................X gS
X=320.32/98=10240/98=104,48 g S
/ =linia de fractie