Question

determina la densidad del oxigeno a 1atm y 18 gradosCm.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