Atoms in 15L Ar at STP: 4.0325x1023

[fcb]

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

 

[Borek]

Correct approach, incorrect significant digits.

--
methods

 

[fcb]

Can you give me a hint as to where i went wrong.

 

[Borek]

Your final answer should have the same amount of significant figures as your data. Otherwise calculations are correct.

--
methods