1. In nature, substances are typically mixed.
QUESTION:
A naturally-occurring sample of matter most likely consists of… A. a single element B. a single compound C. a mixture
D. a pure substance
In nature, substances are typically mixed.
Pure substance = sample containing one element or one compound
A pure substance is typically obtained in the lab by separating a mixture into its components.
SCRIPT:
A naturally-occurring sample of matter most likely consists of… A. a single element B. a single compound C. a mixture
D. a pure substance
PAUSE CLICK In nature, substances are typically mixed. The correct answer is C.
The term pure substance refers to a sample of matter consisting of only one element, OR… only one compound.
In general, a pure substance can only be obtained in the laboratory. This is done by separating a sample of matter into its component substances. A sample that cannot be separated into two or more distinct components is called an element.
PAUSE CLICK END RECORDING

2. Video ID: © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08