The molar mass of lithium is found using the periodic table.
Understanding Molar Mass
Molar mass refers to the mass of one mole of a substance. One mole of any substance contains Avogadro's number of particles, which is approximately 6.022 x 1023 particles. The molar mass is numerically equivalent to the atomic mass found on the periodic table, but expressed in grams per mole (g/mol) rather than atomic mass units (amu).
Steps to Find the Molar Mass of Lithium
- Locate Lithium on the Periodic Table: Find the element Lithium (Li) on the periodic table.
- Find the Atomic Mass: The atomic mass of lithium is usually located below its symbol. Look for the number; it should be around 6.94.
- Use atomic mass as molar mass: The atomic mass given in the periodic table is numerically equal to the molar mass in g/mol.
- State the Molar Mass: Therefore, the molar mass of lithium is approximately 6.94 g/mol.
Practical Application
The provided YouTube video clip, titled "How to Find the Mass of One Atom of Lithium (Li)", explains finding the mass of one atom of lithium using a conversion factor knowing that one mole of any substance is Avogadro's number of particles. Though the video deals with the mass of an atom, it also includes that the molar mass of lithium is the atomic mass found on the periodic table.
- For example: if you have 1 mole of lithium atoms, it will have a mass of approximately 6.94 grams.
Summary
The molar mass of lithium is the atomic mass found on the periodic table for lithium expressed in grams per mole (g/mol).
| Element | Symbol | Atomic Mass (amu) | Molar Mass (g/mol) |
|---|---|---|---|
| Lithium | Li | Approximately 6.94 | Approximately 6.94 |
