Answer:
A strong acid
Any strong acid (such as HCl, HBr, or 
) will completely dissociate forming a very weak conjugate base and H3O which will be acidic.
Try C I’m sorry if you get it wrong but I’m like 90% sure
Answer:
It should be Magnetic fields can push and pull objects without touching
but I only say with touching. Maybe it's an error on you're teachers/Prof behalf.
Answer:
It is Na2O because it doesn't show any acidic properties.
Answer:
friction and air resistance
at terminal velocity, the weight of the object due to gravity is balanced by the frictional forces, and the resultant force is zero.
