A humidifier putting moisture in the air IS a physical change.
<span>The purpose of washing the product with NaOH is simply to
neutralize any acid which remained or leaked after the 1st initial
separation. The NaOH base reacts with the acid to form neutralization reaction products
which are soluble in water.</span>
Answer:
have stars that might appear to wobble
often have one star that is brighter than the other
Explanation:
A binary star system is a star system made up of mostly two stars that moves round their common fixed center.
The two orbiting stars are gravitationally bonded to one another and they move round each other.
Most binary stars might appear wobble. One of the stars often appears brighter than the other.
Answer:
The answer to your question is below
Explanation:
Element Atomic number Protons Electrons
S (sulphur) 16 16 16
V (vanadium) 23 23 23
B (Boron) 5 5 5