Question 1 An atom of magnesium and two atoms of chlorine react and yield the compound of magnesium chloride. Which option represents this scenario as a chemical equation? 2Cl → → Mg + MgCl2 2Cl right arrow Mg + MgCl2 Mg + 2Cl → → MgCl2 Mg + 2Cl right arrow MgCl2 MgCl2 → → Mg + Mg + Cl MgCl2 right arrow Mg + Mg + Cl Mg → → 2Cl + MgCl2 Mg right arrow 2Cl + MgCl2 MgCl2 → → Mg + 2Cl

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e