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Chm CH2 Density
Chemistry Lab 1033 Chapter 2 study guide
Term | Definition |
---|---|
Density | is Mass(g)/Volume (l) |
Mass unit often used | gram (g) |
Volume unit often used | milliliter (ml) or cubic centimeter (cm3) |
Mass in units is measured using a | balance |
Volume in units is measured using a | graduated cylinder |
meniscus | the curve in the upper surface of a liquid |
element | a substance made from only one type of atom.the simplest substances and hence cannot be broken |
compound | a substance consisting of 2 or more elements, that can be broken down. |
Distinguish between mass and weight | Mass remain the same regardless of the environment. However weight varies from place to place. |
What happen when a liquid is heated | it usually expands to occupy a larger volume |
Specific gravity is | density of sample/density of water and has no unit |
Pb | lead |
K | potassium |
I | iodine |
Na | Sodium |
N | Nitrogen |
O | Oxygen |
S | Sulfur |
C | Carbon |
Fe | Iron |
C2H6O | Ethyl alcohol |
Measure Mass of water | mass of cylinder with water subtracted by the mass of empty cylinder. |
volume of water | use the bottom of the meniscus and the volume marking on the cylinder |