Question 13
h3o+ units are also known as
a)hydrogen ions
b)hydronium ions
c)hydroxide ions
d)hydroxyl groups

H3O+ units are also known as hydronium ions. Hence the answer is option B.  

Explanation:

Hydronium ions is defined as ions that contains proteinated ions and it is present in all the aqua solutions. These ions are abundant in protons and they have less electrons in them. It is because they had donated electrons to their other forms which gives a positive sign to the ion.

Hydronium ion is produced when an Arrhenius acid is mixed with dihydrogen oxide. This iron is found in universe like in comets, interstellar things, etc.  

answer; /// i believe the correct answer is (reactants);

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation: