Multiple Choice
Which statement is true at standard temperature and pressure (STP)? (The atomic mass of Mg is 24.31 u.)
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7. Gases
Standard Temperature and Pressure
Multiple Choice
At standard temperature and pressure (STP), which volume will be occupied by a gas containing 6.02 × 10^{23} atoms?
A
0.0821 L
B
11.2 L
C
22.4 L
D
1.00 L
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 fundamental concept in gas laws.
Identify the number of atoms given: 6.02 × 10^{23} atoms. This number is Avogadro's number, which corresponds to one mole of particles (atoms, molecules, etc.).
Since the problem states the gas contains 6.02 × 10^{23} atoms, it means we have exactly one mole of gas atoms.
Use the molar volume of a gas at STP to find the volume occupied by one mole of gas: 22.4 L per mole.
Conclude that the volume occupied by the gas containing 6.02 × 10^{23} atoms at STP is 22.4 liters.
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