Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post
 You are Here: Home

# gas volume question

Announcements Posted on
Take our short survey, £100 of Amazon vouchers to be won! 23-09-2016
1. can someone explain the theory behind this question? i would have thought the answer is ethane?
2. you would use the formulas

n=m/Mr then n=v/24
if you wanted to do it the long way
but you can tell from the relative mass that ethane would have the greatest
3. (Original post by happiness12)
you would use the formulas

n=m/Mr then n=v/24
if you wanted to do it the long way
but you can tell from the relative mass that ethane would have the greatest
the answer's D though...
4. (Original post by gomc)
can someone explain the theory behind this question? i would have thought the answer is ethane?

1 mole of any gas will fill the same volume at a given temperature and pressure according to the ideal gas law (pV=nRT).

This means that when we think about taking 1 gram of a substance, the gas with the largest volume will be the one with the smallest atomic/molecular mass. This is because 1 gram of a light gas consists of more atoms/molecules than 1 gram of a heavy gas.

If we think about these gases (using the atomic masses given) ethane (C2H6) has a mass of 30 amu;
Oxygen exists as O2 mass 32 amu; Fluorine exists as F2 mass 38 amu; Ne exists as atoms mass 20 amu
so 1 gram of neon must have the largest volume.

Write a reply…

Submit reply

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
that username has been taken, please choose another Forgotten your password?
2. this can't be left blank
this email is already registered. Forgotten your password?
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register
2. Slide to join now Processing…

Updated: September 17, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### Justine Greening Q&A

Exam reform and more; post a question for the education secretary

### Win White Island premiere tickets

Poll
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.