To balance A

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Solution

Q.
To balance $A l {(O H)}_{3} + H N O_{3} ⟶ A l {(N O_{3})}_{3} + H_{2} O$ , number of $H N O_{3}$ molecules required will be:

1 2

2 4

3 3

4 8

Ans.
(3)

Three molecules of $H N O_{3}$ are required to balance the given chemical reaction and to satisfy the law of conservation of mass.

$A l {(O H)}_{3} + 3 H N O_{3} ⟶ A l {(N O_{3})}_{3} + 3 H_{2} O$

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