March 29, 2024, 07:18:02 AM
Forum Rules: Read This Before Posting


Topic: Can someone help me figure this out?  (Read 6287 times)

0 Members and 1 Guest are viewing this topic.

Offline whittfred

  • New Member
  • **
  • Posts: 7
  • Mole Snacks: +0/-0
Can someone help me figure this out?
« on: August 14, 2007, 09:57:41 PM »
I Have to use this equation:  N2+ 3H2=2NH3 to answer the question

The question states:  If 2.0 moles of N2 reacts completly, how many grams of NH3 will be produced?  I came up with 4.0g. But I don't think its correct.

"PLEASE HELP"

Offline macman104

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 1644
  • Mole Snacks: +168/-26
  • Gender: Male
Re: Can someone help me figure this out?
« Reply #1 on: August 14, 2007, 10:58:28 PM »
uhh.....you mean, 4 moles?  You need to covert that to grams, 2 moles of N2 creates 4 moles of NH3.  Not 4 grams.

Offline profmsg

  • Regular Member
  • ***
  • Posts: 68
  • Mole Snacks: +3/-12
Re: Can someone help me figure this out?
« Reply #2 on: August 15, 2007, 07:15:27 AM »
yeh your right. but your unit for NH3 is not correct should be moles... if you want your answer in grams just convert 2 mole of N2 into gram and multiply by 2 ....

Offline DrCMS

  • Chemist
  • Sr. Member
  • *
  • Posts: 1296
  • Mole Snacks: +210/-81
  • Gender: Male
Re: Can someone help me figure this out?
« Reply #3 on: August 15, 2007, 10:02:00 AM »
yeh your right. but your unit for NH3 is not correct should be moles... if you want your answer in grams just convert 2 mole of N2 into gram and multiply by 2 ....

No they wanted the weight of ammoina produced from 2 moles of nitrogen not the weight of 4 moles of nitrogen.

2N2 + 3H2 -> 4NH3

2 moles of nitrogen give 4 moles of ammonia which weigh 72g in total (4x18 = 72)

Offline wilson

  • Regular Member
  • ***
  • Posts: 51
  • Mole Snacks: +0/-0
  • Gender: Male
Re: Can someone help me figure this out?
« Reply #4 on: August 15, 2007, 12:59:25 PM »
No they wanted the weight of ammoina produced from 2 moles of nitrogen not the weight of 4 moles of nitrogen.

2N2 + 3H2 -> 4NH3

2 moles of nitrogen give 4 moles of ammonia which weigh 72g in total (4x18 = 72)
Just wanted to add:
1. Shouldn't the mole coefficient of H2 be 6?
2. Why (4*18)g? Ammonia's Mr is 17. Then, 4*17=68g

Offline DrCMS

  • Chemist
  • Sr. Member
  • *
  • Posts: 1296
  • Mole Snacks: +210/-81
  • Gender: Male
Re: Can someone help me figure this out?
« Reply #5 on: August 15, 2007, 05:13:07 PM »
No they wanted the weight of ammoina produced from 2 moles of nitrogen not the weight of 4 moles of nitrogen.

2N2 + 3H2 -> 4NH3

2 moles of nitrogen give 4 moles of ammonia which weigh 72g in total (4x18 = 72)
Just wanted to add:
1. Shouldn't the mole coefficient of H2 be 6?
2. Why (4*18)g? Ammonia's Mr is 17. Then, 4*17=68g

Yes its 68 not 72 and for 2N2 yes 6H2 gives 4NH3.

Sponsored Links