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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 |