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The Core

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Submitted By eunicejierlyn
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University of the East
College of Engineering
-------------------------------------------------
Laboratory Experiment #1

Group # 3
Submitted by: Ferdinand Jr. A. Manalili
ZCH 112 – EN 11A
Date Performed: June 25, 2014
Date Submitted: July 30, 2014
II. Introduction
This is an experiment conducted for learners to have a good observation about measurements and understand how it does works along with Science. This activity will seek answers on how to make calculations on density, mass, and volume. It uses some particular apparatuses from the lab to make measurements more accurate and precise guided by the professor in charge of the activity.

III. Materials
Materials and Apparatuses:
Metal block, Metric ruler, Small pebbles,and 10.0% (m/v) table sugar solution

Platform balance, 50-mL graduated cylinder, 25-mL graduated cylinder, 50-mL beaker, and medicine dropper

IV. Results 1. Why chemicals are never placed directly on the balance pans? Because you need to make sure chemicals are properly and safely put on and back so you wouldn’t have any trouble when you’re done. Also it was a requirement for you to be safe while measuring something. 2. Why must objects be weighed at room temperature? It should be on a fair temperature since it may affect the accuracy of the measurement. The movement of molecules while measuring may be affected by the temperature so it needs to be in balanced temperature. 3. What would be the effect on the density of a solid whose volume was determined by water displacement if a. Air bubbles were present in the water? The measurement will be inaccurate because of the air going out of the object. b. The solid was not completely immersed? The measurement in displacement in water won’t be accurate if the object is floating or not completely inside the liquid. 4. Find out from your instructor the accepted

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