Question

different physical and chemical properties.
when a substance is a reactant in a chemical reaction, its chemical structure changes. during
the reaction, the atoms that make up the reactants are rearranged to form products. after
the reaction, the products together are composed of the same atoms as the reactants, but
those atoms are arranged in a different way. so, the products have different chemical
structures than the reactants.

the chemical reaction that produces soap is
called saponification. during one type of
saponification, oil and sodium hydroxide
undergo a chemical change to produce glycerol
and soap. as a result of this reaction, the soap
has different properties than the oil and sodium
hydroxide. some of these properties are what
give soap its cleaning ability.

which of the following statements are true? select all that apply.
a substances chemical structure affects its
properties.
a chemical change occurs during saponification.
soap is a reactant in the saponification reaction.
together, the products of a chemical reaction have
the same arrangement of atoms as the reactants.

Explanation:

1. The opening text states substances with different structures have different properties, so the first statement is true.
2. The text explicitly says saponification is a chemical reaction where oil and sodium hydroxide undergo chemical change, so the second statement is true.
3. The text notes soap is a product of saponification (reactants are oil and sodium hydroxide), so this statement is false.
4. The opening text clarifies products have the same atoms as reactants but in a different arrangement, so this statement is false.

Answer:

A. A substance's chemical structure affects its properties.
B. A chemical change occurs during saponification.