What is the pressure of a 1.0 L flask containing 0.60 g of He at 25°C? (R= 0.0821 L atm/ mol K)

Name: What is the pressure of a 1.0 L flask containing 0.60 g of He at 25°C? (R= 0.0821 L atm/ mol K)
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Question

Quizplus · Accepted Answer

First, we need to calculate the number of moles of He:

n = m/MW = 0.60g/4.003g/mol = 0.15 mol

Next, we can use the ideal gas law to find the pressure:

PV = nRT

P = nRT/V

P = (0.15 mol) x (0.0821 L atm/mol K) x (25°C + 273.15 K) / 1.0 L

P = 3.7 atm

Therefore, the answer is B) 3.7 atm.

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