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Chemistry - Stoichiometry - Some limiting reactants

  1. Oct 23, 2005 #1
    Did I answer these questions correctly?

    5. In the reaction N2 + 3H2 -> 2NH3, if 20.0g of hydrogen reacts:
    ....a. How many grams of ammonia are produced?

    ........20.0g H2...|1 mol H2..|2 mol NH3.|...17.04g NH3
    .......................|2.02g H2.| 3 mol H2..|....1 mol NH3
    112.5 grams of ammonia are produced.

    ....b. How many grams of nitrogen react?

    ........20.0g H2 ...|1 mol H2..|1 mol N2.| 14.01g N2
    ........................|2.02g H2.| 3 mol H2| 1 mol N2
    46.2g of nitrogen react.

    I think I did something wrong in part b. 20g +46.2g doesn't make 112.5g

    btw, is there an easier way to format text (spaces) and how does (I think) latex work?
     
    Last edited: Oct 23, 2005
  2. jcsd
  3. Oct 23, 2005 #2

    Gokul43201

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    Your method is correct in both parts.

    Your only error (in part b) is with the molar mass of N2, which should be around 28. You forgot to double the atomic mass !!
     
  4. Oct 23, 2005 #3

    Gokul43201

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    The only wat to format spaces is by enclosing the text within
    Code (Text):
     [/code ] tags.

    For [itex]\LaTeX[/itex] see : [url]https://www.physicsforums.com/showthread.php?t=9021[/url]
     
  5. Oct 23, 2005 #4
    Thanks a lot for your help with the problem and my other questions.


    It's always those little errors that get me...:grumpy:
     
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