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YvonneHarrisonWA1_CHE-111-jun16 - Name Yvonne Harrison...

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Name: Yvonne Harrison College ID:0422095 Thomas Edison State University General Chemistry I (CHE-111) Section no.: 009 Semester and year: Spring 2017 Written Assignment 1: Introduction and Measurement Answer all assigned questions and problems, and show all work. 1. Do the following statements describe chemical or physical properties? (10 points) a. Oxygen gas supports combustion.- Chemical. In order for this statement to be supported the process must be carried out. b. Fertilizers help to increase agricultural production.- Physical- This is a known property of what fertilizers do. c. Water boils below 100°C on top of a mountain.- Physical- This would be a physical attribute of water. d. Lead is denser than aluminum.- Physical- In order to know that lead is denser than aluminum it is important to know the physical properties. e. Uranium is a radioactive element.- Chemical- In order for this statement to be supported it must be demonstrated that Uranium is indeed a radioactive element. In order for it to be radioactive there must be a chemical change. (Reference: Chang 1.11) 2. Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture: (7 points) An element is a substance that cannot be separated into simpler substances by chemical means.
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