Respuesta :

A sample of oxygen gas had a volume of 2.50 L at STP.

Answer : The mass of oxygen is 160 grams.

Solution : Given,

Moles of [tex]O_2[/tex] = 5 moles

Molar mass of [tex]O_2[/tex] = 32 g/mole

Formula used :

[tex]\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2[/tex]

[tex]\text{ Mass of }O_2=(5moles)\times (32g/mole)[/tex]

[tex]\text{ Mass of }O_2=160g[/tex]

Therefore, 160 grams of [tex]O_2[/tex] are in 5.0 moles of the oxygen gas.


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