Answer:
MgCl2 + 2AgNO3 → 2AgCl + Mg(NO3)2
Explanation:
I'm assuming you want to balance it so...
The first thing I see is that there are two chlorines on the reactant side and one on the product side
Adding a coefficient of 2 would get 2AgCl2
Now there are two silvers on the reactant side, so add a 2 to AgNO3 on the products side. Now they are all balanced.
If that is not what you are looking for let me know!
Answer:
a) Sm
Explanation:
Hello,
This substantiation could be done by knowing how to compute the released energy for 1 mol the oxide. Thus, for Sm, the computation turns out into:

The sign just indicates that the heat is released due to the chemical reaction and it matches with the indicated heat in the statement.
Best regards.
The rest of<span> the month it can be anywhere from 0 to180 degrees away and, at least in theory, visible in the daytime sky. At full </span>moon<span>, the </span>moon<span> is exactly opposite the sun. This means that the </span>moon<span> rises just as the sun is setting, and sets just as the sun is rising.</span>