Question

la formula empírica de un gas es CH2, si su densidad de condiciones normales es de 2,51g/l, ¿Cual es la formula molecular del gas?

Answer 1

Fórmula de los gases:
P x V = n x R x T

D = m/v
P  = ( m/v) x R x T

Mm= Masa molecular

d = densidad

P = 1 atm.

T = 273 K

R = 0.0821 (atm L/ mol K)

Mm = d x R  x T  / P

Mm = 2.51 g/L x 0.0821 (atm L/mol K) x 273 / 1 atm
Mm= 56.26 g/mol

Mm de la fórmula empírica:

C: 1 x 12 = 12 g/mol

H: 2 x 1 = 2 g/mol
``````````````````````````````
       Mm = 14 g/mol

n = 56.26 g/mol / 14 g/mol

n = 4

FORMULA MOLECULAR:

(CH₂)₄ = C₂H₈

Answer 2

Respuesta:

Fórmula de los gases:

P x V = n x R x T

D = m/v

P = ( m/v) x R x T

Mm= Masa molecular

d = densidad

P = 1 atm.

T = 273 K

R = 0.0821 (atm L/ mol K)

Mm = d x R x T / P

Mm = 2.51 g/L x 0.0821 (atm L/mol K) x 273 / 1 atm

Mm= 56.26 g/mol

Mm de la fórmula empírica:

C: 1 x 12 = 12 g/mol

H: 2 x 1 = 2 g/mol

``````````````````````````````

Mm = 14 g/mol

n = 56.26 g/mol / 14 g/mol

n = 4

FORMULA MOLECULAR:

(CH₂)₄ = C₂H₈

Explicación:

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