Answer:
CO32−
Explanation:
We have to consider the valencies of the polyatomic ions involved. Recall that it is only a polyatomic ion with a valency of -2 that can form a compound which requires two sodium ions.
When we look closely at the options, we will realize that among all the options, only CO32− has a valency of -2, hence it must be the required answer. In order to be double sure, we put down the ionic reaction equation as follows;
2Na^+(aq) + CO3^2-(aq) ---------> Na2CO3(aq)
In an exothermic reaction, heat is transferred to the surrounding.
Hope this helps, have a great day ahead!
I think the answer is -12.7
The more protons you add, the more positively charged the atom becomes
the charge of an atom determines what kind of an atom it is <span />
The purpose of an inclined plane is to reduce force.
