Answer:
[tex]2HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)[/tex]
Explanation:
Hello.
In this case, considering that the reaction between nitrous acid and calcium hydroxide yield both water and calcium nitrite as a neutralization chemical reaction:
[tex]HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)[/tex]
As it is not balanced due to the two nitrites at the right, we obtain:
[tex]2HNO_2(aq)+Ca(OH)_2(aq)\rightarrow H_2O(l)+Ca(NO_2)_2(aq)[/tex]
Which means that 2 before the nitrous acid balance both nitrogen and oxygen.
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