Question
Pure Substances and Mixtures
Pure Substances and Mixtures
Two classifications of matter are pure substances and mixtures. Pure substances have a definite chemical composition, cannot be separated by physical means, and consist of one or more types of atoms.
Mixtures do not have a definite chemical composition, can be separated by physical means, and consist of two or more types of substances.
A student constructs models of elements, molecules, compounds, and mixtures using different colors of balls and black plastic sticks. A key for each element and the chemical bond is shown.
Multiple Choice Question
A model of a substance in a container is shown.
The model shows a clear jar with a lid containing three models of substances. One substance has a blue ball attached to two red balls. A second substance has one red ball attached to a light blue ball. And a third substance consists of a single green ball.
Which best describes the substance in the container?
A.
It is a mixture because it has a definite chemical composition and cannot be separated by physical means.
B.
It is a mixture because it does not have a definite chemical composition and can be separated by physical means.
C.
It is a pure substance because it has a definite chemical composition and cannot be separated by physical means.
D.
It is a pure substance because it does not have a definite chemical composition and can be separated by physical means.
Pure Substances and Mixtures
Two classifications of matter are pure substances and mixtures. Pure substances have a definite chemical composition, cannot be separated by physical means, and consist of one or more types of atoms.
Mixtures do not have a definite chemical composition, can be separated by physical means, and consist of two or more types of substances.
A student constructs models of elements, molecules, compounds, and mixtures using different colors of balls and black plastic sticks. A key for each element and the chemical bond is shown.
Multiple Choice Question
A model of a substance in a container is shown.
The model shows a clear jar with a lid containing three models of substances. One substance has a blue ball attached to two red balls. A second substance has one red ball attached to a light blue ball. And a third substance consists of a single green ball.
Which best describes the substance in the container?
A.
It is a mixture because it has a definite chemical composition and cannot be separated by physical means.
B.
It is a mixture because it does not have a definite chemical composition and can be separated by physical means.
C.
It is a pure substance because it has a definite chemical composition and cannot be separated by physical means.
D.
It is a pure substance because it does not have a definite chemical composition and can be separated by physical means.
Answers
GPT-4o mini
The best answer that describes the substance in the container is:
**B. It is a mixture because it does not have a definite chemical composition and can be separated by physical means.**
This is because the model contains multiple different substances (the blue and red balls, the red and light blue balls, and the single green ball), indicating that it is not a pure substance but rather a mixture of different components.
**B. It is a mixture because it does not have a definite chemical composition and can be separated by physical means.**
This is because the model contains multiple different substances (the blue and red balls, the red and light blue balls, and the single green ball), indicating that it is not a pure substance but rather a mixture of different components.