<em>Role of a catalysts in chemical reactions:</em>
<span><em>Catalyst is a substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process.</em></span>
Answer is: <span>ch3co2h; acetic acid.
</span><span>An Arrhenius acid is a
substance that dissociates in water to form hydrogen ions or protons.
</span>Acetic acid dissociate in aqueous solution to form hydrogen ions (H⁺) and acetic anion (CH₃COO⁻).
<span>Balanced chemical reaction (dissociation):
CH</span>₃COOH(aq) ⇄ CH₃COO⁻(aq) + H⁺(aq).
Answer:
about 93 billion light years
Explanation:
The observable Universe is, of course, much larger. According to current thinking it is about 93 billion light years in diameter.
