The food we eat is can sometimes bo bad or good but it relates to the energy in our because it turns into energy and then we have strenght to do something and stay healthy.
I think it's call a magnet
The formal charge of H = +1, because F in compounds can have only -1.
Just choice D.
If you find the number of atoms of each element, you will find that only choice D has the same amounts on each side of the equation.
