Multiple Choice
Compared with 1 mole of hydrogen gas at standard temperature and pressure (STP), 1 mole of argon gas at STP occupies:
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7. Gases
Standard Temperature and Pressure
Multiple Choice
At standard temperature and pressure (STP), how many moles of neon gas occupy a volume of 14.3 L?
A
2.14 mol
B
1.00 mol
C
0.638 mol
D
0.320 mol
Verified step by step guidance1
Recall that at standard temperature and pressure (STP), one mole of any ideal gas occupies a volume of 22.4 liters. This is a key concept from the ideal gas law and molar volume of gases.
Write down the known values: volume of neon gas, \(V = 14.3\ \text{L}\), and molar volume at STP, \(V_m = 22.4\ \text{L/mol}\).
Set up the relationship between volume and moles using the molar volume: \(n = \frac{V}{V_m}\), where \(n\) is the number of moles.
Substitute the known values into the equation: \(n = \frac{14.3}{22.4}\).
Perform the division to find the number of moles of neon gas occupying 14.3 L at STP.
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