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Densidad y masa molecular de un gas

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Densidad y masa molecular de un gas

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Quiz sobre ρ y M de gases

Created by

Madelin Días
Madelin Días
Ecuador

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Densidad y masa molecular de un gas
 

Densidad y masa molecular de un gasOnline version

Quiz sobre ρ y M de gases

by Madelin Días
1

¿Qué unidad usa la densidad de un gas en condiciones estándar?

2

La fórmula ρ = PM/RT relaciona densidad con qué variables.

3

Si un gas tiene M = 44 g/mol, ¿qué gas es típicamente?

4

¿Qué ocurre con la densidad si aumentas P a temperatura constante?

5

Masa molecular y masa molar son lo mismo en qué unidad?

6

Si 1 mol de gas a 298 K y 1 atm tiene M = 28 g/mol, ¿cuál es la densidad aproximada?

7

¿Qué mide la masa molar M?

8

¿Qué ocurre con la masa molar si el gas es más pesado?

9

En condiciones idénticas, ¿qué gas es más denso, He o Xe?

10

¿Qué relación conecta densidad y masa molar a temperatura y presión constantes?

Explicación

La densidad de gases a CN suele expresarse en g/L.

ρ depende de P, M, T y R según la ecuación de estado ideal.

M ≈ 44 g/mol es típico de CO2.

ρ = PM/RT, así que aumenta con P.

La masa molar suele expresarse en g/mol.

ρ ≈ PM/RT; con P=1 atm, T=298 K, M=28 g/mol.

M es la masa de 1 mol de sustancia.

Mayor M implica mayor densidad a condiciones dadas.

Xe tiene M mucho mayor que He.

Con P y T constantes, ρ es proporcional a M.

 
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