Question

Buna seara,

Cate molecule sunt si numarul de atomi in:
1) 19,6 g de acid sulfuric - H2SO4?
2) 80 kg de trioxid de sulf - SO3?
Astept rezovarea explicita, detaliata.

Multumesc mult!
O seara minunata!

Answer 1

1) NA=6.022*10(23) molecule/mol (Nr lui Avogadro)
nr de moli(n)=m/M; MH2SO4=98g/mol; n=19.6/98=0.2moli
 1mol....6.022*10(23)molecule
0.2moli.....x; x=1.205*10(23)molecule
Din formula acidului sulfuric rezulta:
1 mol acid.....2atomiH....1atomS...4atomiO
0.2moli...a=0.4atomiH...b=0.2atomiS...c=0.8atomiO
Nu stiu daca sunt calculati corect nr.de atomi!!
Pt punctul 2,acelasi mod de calcule.