Atoms in 15L Ar at STP: 4.0325x1023

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The calculation for the number of atoms in 15 liters of argon (Ar) at standard temperature and pressure (STP) involves dividing the volume by the molar volume of a gas (22.4 L) and then multiplying by Avogadro's number (6.022 x 10^23). The initial calculation yielded 4.0325 x 10^23 atoms, but the significant figures were incorrect. The final answer should reflect the appropriate number of significant figures based on the given data. The method used for the calculation was correct, but attention to significant digits is crucial for accuracy. Properly addressing significant figures will ensure the answer is valid.
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Homework Statement


How many atoms are contained in 15 litres of Ar at STP


Homework Equations




The Attempt at a Solution


I just did 15/22.4 = 0.669642
0.669642 x 6.022x1023

=4.0325x1023

Is this correct. Thanks so much for your helo
 
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Correct approach, incorrect significant digits.

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methods
 
Can you give me a hint as to where i went wrong.
 
Your final answer should have the same amount of significant figures as your data. Otherwise calculations are correct.

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methods
 
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