CHEM 103 MIDTERM QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS GUARANTEED
SUCCESS!!!
Question: What are the defining features of a "Pure Substance" in chemistry?
Answer: ✔️✔️ A pure substance is a form of matter that has a constant chemical
composition and consistent properties throughout the entire sample. It cannot be
separated into other components by physical means, only by chemical reactions.
Question: What are some common real-world examples of pure substances?
Answer: ✔️✔️ Examples include:
Elements: Pure copper and gaseous oxygen.
Compounds: Distilled water ($H_2O$), sodium chloride (table salt), and
sodium bicarbonate (baking soda).
Question: How is an "Extensive Property" defined?
Answer: ✔️✔️ An extensive property is a physical characteristic that changes
proportionally with the size or amount of the sample being measured. If you
double the amount of matter, these values will also double.
Question: What characterizes an "Intensive Property" of a substance?
Answer: ✔️✔️ Intensive properties are independent of the amount of matter
present. These are "intrinsic" to the identity of the substance, such as density,
boiling point, or color, and remain the same whether you have a gram or a ton of
the material.
Question: Is mass classified as an intensive or extensive property?
ANSWERS WITH COMPLETE
SOLUTIONS GUARANTEED
SUCCESS!!!
Question: What are the defining features of a "Pure Substance" in chemistry?
Answer: ✔️✔️ A pure substance is a form of matter that has a constant chemical
composition and consistent properties throughout the entire sample. It cannot be
separated into other components by physical means, only by chemical reactions.
Question: What are some common real-world examples of pure substances?
Answer: ✔️✔️ Examples include:
Elements: Pure copper and gaseous oxygen.
Compounds: Distilled water ($H_2O$), sodium chloride (table salt), and
sodium bicarbonate (baking soda).
Question: How is an "Extensive Property" defined?
Answer: ✔️✔️ An extensive property is a physical characteristic that changes
proportionally with the size or amount of the sample being measured. If you
double the amount of matter, these values will also double.
Question: What characterizes an "Intensive Property" of a substance?
Answer: ✔️✔️ Intensive properties are independent of the amount of matter
present. These are "intrinsic" to the identity of the substance, such as density,
boiling point, or color, and remain the same whether you have a gram or a ton of
the material.
Question: Is mass classified as an intensive or extensive property?
