0.75 moles of NH3 molecules contain how many moles of hydrogen?

  • Chemistry
  • Thread starter LaNell
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Homework Statement




0.75 moles of NH3 molecules contain how many moles of hydrogen????

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Answers and Replies

  • #2
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You can use ratios, so in NH3 you have:

number of Nitrogen atoms : number of Hydrogen atoms = n(N) : n(H) = 1 : 3

Therefore, for each mole of Nitrogen atoms you have 3 moles of Hydrogen atoms

As such, when you have 0.75 mol of NH3 molecules this means there is 0.75 mol of Nitrogen atoms (ie: n(N) = 0.75), and therefore the n(H) = 3 * 0.75 = 2.25mol.
 

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