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Chapter 16.2. Measuring Matter. Measuring mass and volume. Using a graduated cylinder or measuring cup. Read the mark on the cylinder/cup at eye level Read the mark on the bottom of the curve of the meniscus. (bottom of the curve). Calculating volume of solids using formulas p. 280.
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Chapter 16.2 • Measuring Matter
Using a graduated cylinder or measuring cup • Read the mark on the cylinder/cup at eye level • Read the mark on the bottom of the curve of the meniscus. (bottom of the curve)
Find the volume of an irregular shaped object • Done using a technique called displacement • displacement means to “take the place of”
How to use displacement • Fill a graduated cylinder with water. (50 ml) • Put the object in the water • Find the new amount. This is the volume of water and object. • Subtract the ending volume from the beginning volume. • This is the volume of the irregular object.
Grams are also used to measure the amount of material instead of actual volume.
Uses proportions • mass of the sample / volume of the sample = mass of the object / mass of the object