WA1_CHE-121-jun16 - Name College ID Thomas Edison State...

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Name: College ID: Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: CHEM-121-OL010 Semester and year: July 2016 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, combustion is an oxidation reaction. b. Fertilizers help to increase agricultural production. Chemical, fertilizer releases chemicals into soil to increase production c. Water boils below 100°C on top of a mountain. Physical No structural change, but change the state of water. d. Lead is denser than aluminum. Physical. Density is physical propety e. Uranium is a radioactive element. Chemical, uranium release electron change its structure. (Reference: Chang 1.11) 2. Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture: (7 points)
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  • Spring '15
  • Khurana
  • Chemistry, Chemical substance, Chemical compound, Edison State University

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