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# Which formula for A-level chemistry do I use for this question?

Can anyone please explain how I can answer this question

A sample of Argon gas has a mass of 0.20g, at a pressure of 100 000 kPa and a temperature of 12C

Which volume does the gas occupy?

Should I be using the ideal gas law for this question?

### 1 Answer

Relevance

- billrussell42Lv 74 weeks ago
Argon is 40 g/mol

0.20 g / 40 g/mol = 0.005 mol

V = nRT/P = (0.005)(8.314)(273.16+12) / (100) = _____ liters

Ideal gas law

PV = nRT

n = number of moles

R = gas constant = 0.08206 (atm∙L)/(mol∙K)

8.314 L∙kPa/mol∙K

0.08314 L∙bar/mol∙K

62.36 L∙torr/mol∙K

62.36 L∙mmHg/mol∙K

T = temperature in kelvins

P = absolute pressure in atm, kPa, bar, torr

V = volume in liters

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