Answer:
3.63 hours or 3 and 37.5 minutes
Explanation:
200/55
Hope this helps :)
If the same atoms appear on both sides, then it's balanced.
In this reaction, there are 4 Oxygens, 2 Carbons, and 2 Nitrogens on each side. So numerically, <em>it's balanced</em>. But I don't know enough chemistry to say whether the reaction is possible.
What that means is the atom is so radioactive that the nucleus is unstable.