the element hydrogen atom is made up of oxygen atoms.
Explanation:
Moles of NaOH = 10g / (40g/mol) = 0.25mol.
0.25mol / 500g = 0.50mol / 1000g = 0.50mol/dm³.
The molarity is 0.50mol/dm³.
I don’t know if I am right but I think it is symbol for the first one and the second one is formula.
An acid has a pH <7. 7 is the pH of a neutral substance, like water, and substance with a pH >7 are considered basic or alkaline.
Yes because the protons are the same but the neutrons change