Question

determina la densidad del oxigeno a 1atm 18grados C m.a(o=16uma)

Answer 1

Mm O2 = 32 g/mol
1. calcular moles
  1 mol ----- 6.022 x 10²³ átomos
       x    -----    1 átomo
x = 1.66 x 10⁻²⁴ mol
2. calcular volumen
P V = n R T
P =1 atm
T = 273 K
R = 0.0821 (L atm / mol K)
V = 1.66 x ⁻²⁴ mol  x  (0.0821 (L atm / mol K) x 273
       ````````````````````````````````````````````````````````````````
                               1 atm
V = 3.72 X 10⁻²³ L
3. CALCULAR MASA
mol = mas/Mm
masa = 1.66 x 10⁻²⁴  mol x 32 g/ mol = 5.312 x 10⁻²³
4. calcular densidad
d = m/v
d = 5.312 x 10⁻²³ g
       ````````````````````
       3.72 x 10⁻²³ L

d = 1.428 g/L