You are Here: Home

# pv = nrt question (OCR) Watch

1. Hi, the question was:

6.2 liters of an ideal gas are contained at 3.0 atm and 37 °C. How many moles of this gas are present?

I got 0.733 but the correct answer was 0.75, according to the website.

Wouldn't it be:
n = pv/rt

300,000 x 0.0062 / 8.314 x 310 = 0.733

I'm asking in case this comes up in the exam, and I get it wrong by 2 d.p. or something :/

Thanks for the help
2. (Original post by _Lizabeth_)
Hi, the question was:

6.2 liters of an ideal gas are contained at 3.0 atm and 37 °C. How many moles of this gas are present?

I got 0.733 but the correct answer was 0.75, according to the website.

Wouldn't it be:
n = pv/rt

300,000 x 0.0062 / 8.314 x 310 = 0.733

I'm asking in case this comes up in the exam, and I get it wrong by 2 d.p. or something :/

Thanks for the help
Your sum does not come to 0.733 ! it comes to 0.722

But it seems that the website is mistaken..
3. (Original post by charco)
Your sum does not come to 0.733 ! it comes to 0.722

But it seems that the website is mistaken..
Ok, so the equation was right - thank you

And yeah, sorry, it was 0.0063 not 0.0062 - I typed it up wrong

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:
Updated: June 2, 2016
Today on TSR

### Is this person a genius?

...with these A Level results?

### I think I'm transgender AMA

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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.