Question

Determinati masa de amoniac in care se gasesc 28g azot.

Answer 1

NH₃ = amoniac
$M_{NH_3} = 1 \cdot 14 + 3 \cdot 1 = 14 + 3 = 17 g/mol$

17 g NH₃ ____________ 14 g N
 x g NH₃ _____________ 28 g N
$x = \frac{28 \cdot 17}{14} = 2 \cdot 17 = 34 g$ NH₃