Respuesta :

1con

Answer:

Neon

Explanation:

K=C degrees+273.15 = 40.0+273.15=313.2 K

M=1.57g/L×0.08206 atm L/mol K×313.2 K/2.00 atm

M=20.17 g/mol

K= Kelvin

M= Molar Mass

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