Chemical reactions
occur only in living organisms
create and destroy atoms
only occur outside living organisms
produce new substances
2. what does the symbolin a chemical equation mean? heat is supplied to the reaction.
a catalyst is needed.
yields
precipitate
3. a skeleton equation does not show which of the following?
the correct formulas of the reactants and products
the reactants on the left, the products on the right
an arrow connecting the reactants to the products
the relative amounts of reactant