Answer:
a
Explanation:
the solution is extremely acidic and will dissolve the zinc rod
They are examples of physical<span> contaminants .</span>
The answer is true
Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light.The wavelength decreases as the light enters the medium and the light wave changes direction.
Because its only representing the most stable isotope of that element but its considered the atomic mass and not average atomic mass
