Chemistry - Writing Assignment 1 (1).docx - Name: Gisselle...

Name: Gisselle Mealia
College ID: 0654015
Thomas Edison State University
General Chemistry I (CHE-111)
Section no.: OL009
Semester and year: October 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)
a. Oxygen gas supports combustion.
b. Fertilizers help to increase agricultural production.
c. Water boils below 100°C on top of a mountain. d. Lead is denser than aluminum. e. Uranium is a radioactive element.
2. Classify each of the following as an element, a compound, a homogeneous mixture, or a
heterogeneous mixture: (7 points)
a. water from a well
-Compound
b. argon gas
-Element
c. sucrose
-Compound
d. air
-Heterogeneous mixture
e. dirt
-Heterogeneous mixture
f. a rusty iron nail
-Compound
g. ozone
-Compound