Question

oxygen gas reacts with nitrogen monoxide gas to produce nitrogen dioxide gas. write a balanced chemical equation for this reaction.

Explanation:

Step1: Write un - balanced equation

$O_2(g)+NO(g)
ightarrow NO_2(g)$

Step2: Balance oxygen atoms

We have 2 oxygen atoms in $O_2$ and 2 oxygen atoms in $NO_2$. On the left - hand side, in $NO$, there is 1 oxygen atom. To balance oxygen, we put a coefficient of 2 in front of $NO$ and $NO_2$.
$O_2(g) + 2NO(g)
ightarrow 2NO_2(g)$

Step3: Check nitrogen atoms

On the left - hand side, we have 2 nitrogen atoms from 2 moles of $NO$, and on the right - hand side, we have 2 nitrogen atoms from 2 moles of $NO_2$. The equation is balanced.

Answer:

$O_2(g)+2NO(g)
ightarrow 2NO_2(g)$