CHEM 103 MIDTERM QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED
A+ ||UPDATED 2026
pure substance -ANSWER ✔✔A sample of matter, either a single element or a
single compound, that has definite chemical and physical properties
examples of pure substances -ANSWER ✔✔copper, oxygen, salt, baking soda,
water
extensive property -ANSWER ✔✔a property that depends on the amount of
matter in a sample
intensive property -ANSWER ✔✔a physical property that remains the same no
matter how much of a substance is present
Is mass intensive or extensive? -ANSWER ✔✔extensive
Is volume intensive or extensive? -ANSWER ✔✔extensive
Is density intensive or extensive? -ANSWER ✔✔intensive
Allotropes -ANSWER ✔✔two or more different molecular forms of the same
element in the same physical state
density of a pure substance -ANSWER ✔✔is always the same
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED
A+ ||UPDATED 2026
pure substance -ANSWER ✔✔A sample of matter, either a single element or a
single compound, that has definite chemical and physical properties
examples of pure substances -ANSWER ✔✔copper, oxygen, salt, baking soda,
water
extensive property -ANSWER ✔✔a property that depends on the amount of
matter in a sample
intensive property -ANSWER ✔✔a physical property that remains the same no
matter how much of a substance is present
Is mass intensive or extensive? -ANSWER ✔✔extensive
Is volume intensive or extensive? -ANSWER ✔✔extensive
Is density intensive or extensive? -ANSWER ✔✔intensive
Allotropes -ANSWER ✔✔two or more different molecular forms of the same
element in the same physical state
density of a pure substance -ANSWER ✔✔is always the same
