Question

Determinati cantitatea de oxigen continuta in 4,9 g acid sulfuric.

Answer 1

$\mathtt{M_{H_2SO_4}=2A_H+A_S+4A_O=2+32+64=98g/mol}} \\ \\ \mathtt{98g \ H_2SO_4..........64g \ O} \\ \\ \mathtt{4,9g \ H_2SO_4..........x \ g \ O} \\ \\ \mathtt{x=\frac{4,9\cdot64}{98}=3,2g \ O}$