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Andrew [12]
2 years ago
11

What is the number of moles in 40.0 L of He gas at STP?

Chemistry
1 answer:
Alla [95]2 years ago
8 0

Answer: There are 1.78 moles in 40.0 L of He gas at STP

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 1 atm (STP)

V = Volume of gas = 40.0  L

n = number of moles = ?

R = gas constant =0.0821Latm/Kmol

T =temperature =273K   (STP)

n=\frac{PV}{RT}

n=\frac{1atm\times 40.0L}{0.0821Latm/K mol\times 273K}=1.78moles

Thus there are 1.78 moles in 40.0 L of He gas at STP

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