 # Formulae and Equations – Definition

## Terms and Definition

### Relative Atomic Mass

The relative atomic mass of an element is the mass of one atom of the element compared with 1/12 of the mass of an atom of carbon-12

### Relative Molecular Mass

The relative molecular mass of an element is the average mass of one molecule compared with 1/12 of the mass of an atom of carbon-12

### Molar Mass

The molar mass of a substance is the mass of one mole of the  substance

### Molar Volume of a Gas

The molar volume of a gas is the volume occupied by one mole of any gas [ 24dm3 at room temperature; 22.4 dm3 at STP]

### Molecular Formula

The molecular formula is the formula that shows the actual number of atoms of each element that are present in a molecule of an element or compound.

### Empirical Formula

The empirical formula is the formula that shows the simplest whole number ratio of atoms of each element in the compound.

### Mole

Mole is the amount of substance that contains as many particles as the number of atoms in exactly 12 g of carbon-12.

## Flashcards

Relative Atomic Mass
The relative atomic mass of an element is the mass of one atom of the element compared with 1/12 of the mass of an atom of carbon-12

### Define

Relative Molecular Mass
The relative molecular mass of an element is the average mass of one molecule compared with 1/12 of the mass of an atom of carbon-12

### Define

Molar Mass
The molar mass of a substance is the mass of one mole of the  substance

### What is the meaning of

Molar Volume of a Gas
The molar volume of a gas is the volume occupied by one mole of any gas
Molecular Formula
The molecular formula is the formula that shows the actual number of atoms of each element that are present in a molecule of an element or compound.
Empirical Formula
The empirical formula is the formula that shows the simplest whole number ratio of atoms of each element in the compound.
Mole
Mole is the amount of substance that contains as many particles as the number of atoms in exactly 12 g of carbon-12.