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  • Sure thing, Ms. Sevilla.
  • Excuse me, Mr. Evans. Can I ask a favor? I was absent yesterday so I cant really understand the lesson. Can you help me, please?
  • Thank you in advance, Sir!
  • The first thing to do is to convert the given problem into a word equation
  • So, we have an example right here on the board.
  • Problem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.
  • Magnesium + Nitrogen gas  --->  Magnesium nitride
  •        blem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.
  • That's right, Miss Sevilla!
  • Problem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.
  • Magnesium + Nitrogen gas  --->  Magnesium nitrideMg  +  N2  --->  Mg3N2
  •        blem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.
  • Next, convert the word equation into a chemical equation. 
  • Problem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.Magnesium + Nitrogen gas  --->  Magnesium nitrideMg  +  N2  --->  Mg3N2
  • Magnesium + Nitrogen gas  --->  Magnesium nitrideMg  +  N2  --->  Mg3N23 Mg  +  N2  --->  Mg3N2
  •        blem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.
  • Last is to balance the chemical equation by adding a coefficient before the chemical symbol or chemical formula.
  • Correct! That's right, Miss Sevilla!
  • Problem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.Magnesium + Nitrogen gas  --->  Magnesium nitrideMg  +  N2  --->  Mg3N2
  • Problem:Magnesium reacts with Nitrogen gas to produce Magnesium nitride.Magnesium + Nitrogen gas  --->  Magnesium nitrideMg  +  N2  --->  Mg3N23 Mg  +  N2  --->  Mg3N2
  • No problem, Ms. Sevilla. I told you its easy!
  • Thank you so much, Mr. Evans! I learned a lot today. You explained it very well to me.
  • 'Till next time, Sir! THANK YOU VERY MUCH!
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