-calculez moli e pusi in comun,stiind N,A-numarul lui Avogadro
niu= N/N,A= 48,176X10²³e/6,022X10²³mol e---.> 8mol e
in 1mol molec sunt 4moli e pusi in comun(2e de la 2H si 2e de la S)
x..................................8mol
x= 2mol molecH2S
m,H2S= niuxM= 2molX34g/mol => 68g
niu,acid=m/M=73g/36,5g/mol= 2molHCl
1molHCl...contine 2 mol e pusi in comun( 1e dela H si 1e de la Cl)
2mol......................x= 4mol perechi e
N= niuxN,A= 4mol e x6,022x10²³ e/mol e=........................calculeaza !!!!
