Question

This equation is not balanced. Click on the coefficient we should change first.
help ASAP

Answer 1

Answer: The coefficient we should change first is for
`NO_(3)`.

Step-by-step explanation:

The given reaction equation is as follows.

`Al + Ni(NO_(3))_(2) \rightarrow Al(NO_(3))_(3) + Ni`

Here, number of atoms present on reactant side are as follows.

• Al = 1
• Ni = 1
• 
  `NO_(3)` = 2

Number of atoms present on the product side are as follows.

• Al = 1
• Ni = 1
• 
  `NO_(3)` = 3

To balance this equation, multiply Al by 2 and
`NO_(3)` by 3 on reactant side. Also, multiply
`Al(NO_(3))_(3)` by 2 and Ni by 3 on the product side.

Hence, the equation can be rewritten as follows.

`2Al + 3Ni(NO_(3))_(2) \rightarrow 2Al(NO_(3))_(3) + 3Ni`

Now, number of atoms present on reactant side are as follows.

• Al = 2
• Ni = 3
• 
  `NO_(3)` = 6

Number of atoms present on product side are as follows.

• Al = 2
• Ni = 3
• 
  `NO_(3)` = 6

Since, the atoms on both reactant and product side are same. Hence, it is now a balanced chemical equation.

Thus, we can conclude that the coefficient we should change first is for
`NO_(3)`.