What two properties do all forces have?

The two properties all forces have are: Directionand magnitude or Size

It is adirect requirement that all properties have direction and size...hope this helps, also this may help too!

Interaction pair forces...i.e. no force is ever a "one way street". If object A applies a force to object B, then object B applies a force of same magnitude and almost always opposite in direction on object A.

Hi + naoh -> h2o + nal

The second and last option are the answers