Composition of mixtures
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AP Chemistry › Composition of mixtures
Which of the following mixtures is not a homogeneous mixture:
Coffee
Tea
Oil and vinegar
A table salt solution
Wine
Explanation
A homogeneous mixture is a uniform mixture of two or more components that appears uniform throughout. The oil and vinegar mixture would not appear uniform, and thus is a heterogeneous mixture.
Which of the following are mixtures
Distilled water
Top soil
Reeses Peanut butter cup
b and c
All of the above
Explanation
A mixture contains two or more different substances. Distilled water only contains liquid water, and is not a mixture.
What differentiates a homogeneous mixture from a pure substance?
A pure substance can be separated into elements by physical means.
A mixture has a defined composition.
A pure substance is always a compound while mixtures can be elements or compounds.
The composition of a pure substance is fixed.
A homogeneous mixture is uniform throughout.
Explanation
A heterogeneous mixture is a mixture of two or more components that do not appears uniform throughout. A pure substance contains only one component that has a fixed composition.
A slice of watermelon would best be described as?
A pure compound
A heterogeneous mixture of compounds
A homogeneous mixture of compounds
A heterogeneous mixture of elements and compounds
None of the above
Explanation
A heterogeneous mixture is a mixture of two or more components that do not appears uniform throughout, but contains components that are elemental (single atom type) and compounds (contain two or more different elements).
Which of the following is a heterogeneous mixture.
Motor oil
Oatmeal chocolate chip cookie
Orange juice with no pulp
Gasoline
All of the above
Explanation
A heterogeneous mixture is a mixture of two or more components that do not appears uniform throughout. The oatmeal chocolate chip cookie mixture would not appear uniform, and thus is a heterogeneous mixture.