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Need help with a mole question

Hi, can I get some help with d? I struggle to work out the volume of air needed and I don't get the last step I need to do.

Attachment not found

this is as far as I got for hi) but the answer doesn't make sense because it mentioned 21% of something. Thanks

1470602465235-2133142556.jpg359.8KB

Reply 1

username2640523

Original post by coconut64

Hi, can I get some help with d? I struggle to work out the volume of air needed and I don't get the last step I need to do.

Attachment not found

this is as far as I got for hi) but the answer doesn't make sense because it mentioned 21% of something. Thanks

I cant see thr second pic, could you post it again

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Reply 2

Jpw1097

Original post by coconut64

Hi, can I get some help with d? I struggle to work out the volume of air needed and I don't get the last step I need to do.

Attachment not found

this is as far as I got for hi) but the answer doesn't make sense because it mentioned 21% of something. Thanks

What you've done looks fine assuming that the reaction takes place at standard temperature and pressure (273K, 100kPa). As you've written, at standard temperature and pressure, one mole of any gas occupies a volume of approximately 24dm³. It would probably be best to convert your answer to dm³ though, which would be 7.92dm³.

Reply 3

coconut64