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# pv = nrt question (OCR)

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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

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