WA1.docx - General Chemistry I(CHE-111 Section no OL009 Semester and year March 2016 Written Assignment 1 Introduction and Measurement Answer all

WA1.docx - General Chemistry I(CHE-111 Section no OL009...

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General Chemistry I (CHE-111)Section no.: OL009Semester and year: March 2016Written Assignment 1: Introduction and MeasurementAnswer all assigned questions and problems, and show all work. 1.Do the following statements describe chemical or physical properties? (10 points)2.Classify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture: (7 points)a.Oxygen gas supports combustion.Chemical because the oxygen would need to be having a chemical reaction in order for that combustion to occur.b.Fertilizers help to increase agricultural production.Chemical because the fertilizer would be reacting with the dirt, plants and water, etc. in order for that increase in production to occur.c.Water boils below 100°C on top of a mountain.Physical because the water does not need to undergo any chemical change inorder to boil, it just increases in temperature.d.Lead is denser than aluminum.Physical because this can be easily observed by just placing samples of each into a container of water.e.Uranium is a radioactive element.I would think radioactivity would be a physical property until or unless the uranium was having a nuclear reaction.(Reference: Chang 1.11)a.water from a wellCompound – the water would still just be water, H2Ob.argon gasElement - Arc.sucroseCompound – C12H22O11d.air
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