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When the temperature of a hollow sphere with 685 L (volume) of helium gas is held at 621 K (temp), the pressure of the gas is 1890 kPa. How many moles of the helium does the sphere contain?

Respuesta :

Eduard22sly

Answer:

250.88moles

Explanation:

From the question given, the following data were obtained:

V = 685 L

T = 621 K

P = 1890 kPa = 1890000Pa

Recall 101325Pa = 1atm

1890000Pa = 1890000/101325 = 18.65atm

R = 0.082atm.L/mol /K

n =?

PV = nRT

n = PV /RT

n = (18.65 x 685)/ (0.082x621)

n = 250.88moles

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