The right answer is
2) NaCl
In fact, from the definition of acid, all acids contain at least one atom of hydrogen. In the options given by the problem, all compounds contain at least one atom of hydrogen H, except for the NaCl: therefore, NaCl is not an acid.
Most of our brain activity is unconscious
Answer:
Explanation:
The minimum distance for takeoff is:
The resistance that one surface or object encounters when moving over another.
"a lubrication system that reduces friction”