Answer:
The number of electrons, in turn, determines the chemical properties of the atom. Protons contribute to the mass of an atom and provide the positive charge to the nucleus. The number of protons also determines the identity of the element
Answer:
4.25% is the final concentration of phosphoric acid.
Explanation:
Initial concentration of phosphoric acid = 
Initial volume of phosphoric acid = 
Final concentration of phosphoric acid = 
Final volume of phosphoric acid = 
( 1L = 1000 mL)



4.25% is the final concentration of phosphoric acid.
Answer:
Not exactly sure what you mean by this, but "The average density of an object equals its total mass divided by its total volume."
Explanation:
Hope this helps!
There are 138 atoms of hydrogen