How to calculate volume of a gas at STP?

  • #1

Homework Statement


Calculate the volume of .250 g of helium at STP.
This seems so simple but I keep getting the wrong answers.
If someone could walk me through how to do this problem so I will know how to do them for our test. Our book doesn't give a good example.


Homework Equations



I know gasses occupy 22.4 L at STP but other then that... I'm not sure how to set up this equation

The Attempt at a Solution

 
Last edited:

Answers and Replies

  • #2
epenguin
Homework Helper
Gold Member
3,873
897

Homework Statement


Calculate the volume of .250 g of helium at STP.
This seems so simple but I keep getting the wrong answers.
If someone could walk me through how to do this problem so I will know how to do them for our test. Our book doesn't give a good example.


Homework Equations



I know gasses occupy 22.4 L at STP but other then that... I'm not sure how to set up this equation

The Attempt at a Solution


More exactly a mole of gas occupies 22.4 L .
So how many moles is 0.25g of He? You can take the atomic mass to be 4.
Moles and atomic mass have got to be in your book so I won't come back on this.
 

Related Threads on How to calculate volume of a gas at STP?

  • Last Post
Replies
6
Views
129K
  • Last Post
Replies
2
Views
10K
  • Last Post
Replies
2
Views
12K
Replies
2
Views
92K
Replies
3
Views
4K
  • Last Post
Replies
3
Views
737
  • Last Post
Replies
5
Views
1K
Replies
2
Views
10K
Replies
11
Views
610
Top