CHE-121-Written Assignment 1.docx

CHE-121-Written Assignment 1.docx - Name Ashley Law College...

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Name: Ashley Law College ID: 0631739 Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: OL009 Semester and year: June 2018 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) 1. Oxygen gas supports combustion. Chemical 2. Fertilizers help to increase agricultural production. Chemical 3. Water boils below 100°C on top of a mountain. Physical 4. Lead is denser than aluminum. Physical 5. Uranium is a radioactive element. Chemical (Reference: Chang 1.11) 2. Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture: (7 points) 1. water from a well. Heterogeneous mixture 2. argon gas. Element 3. sucrose. Compound 4. air. Homogeneous mixture 5. dirt. Heterogeneous mixture 6. a rusty iron nail. Heterogeneous mixture 7. ozone. Element 3. Express the answers to the following calculations in scientific notation: (12 points) 1. 145.75 + (2.3 × 10 –1
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  • Spring '15
  • Khurana
  • Chemistry, Chemical substance, Chemical compound, heterogeneous mixture

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