Balancing Act Mystery Cache

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OK People lets take this back to high school chemistry!

In balancing chemical equations, you can't change a subscript because that would change the whole material you are combining but you can change the coefficient, which is how many of each element or molecule there is. The total number of each specific element must be the same on both sides of the equation.  Please note there are more coefficients than letters for the coordinates.  In other words, the letters are there for the coordinates you will be using.  They are the letters that are bolded and underlined. Check your answers below with Certitude!

Balance the following chemical equations and place the letters in the following coordinates-

N 40 AB.CDE          W 73 FG.HIJ

H H₂ +  O₂ ⇒ G H₂O

 N₂ + F H₂ ⇒ NH₃

P₄O₁₀     +   H₂O  ⇒  D  H₃PO₄

 Al₂O₃    +  C Fe  ⇒   Fe₃O₄    +   E  Al

 KClO₃   ⇒  KCl   +   J O₂ 

 Al    +   I  H₂SO₄    ⇒     Al₂(SO₄)₃     +   H₂

Be₂C   +   B H₂O   ⇒    Be(OH)₂     +   CH₄ 

Cu   +   HNO₃   ⇒  Cu(NO₃)₂    +  NO   +  A  H₂O 

You can validate your puzzle solution with certitude.