The relationship between mass and the number of moles is defined by the molar mass of a substance. Molar mass represents the mass of one mole of a substance, and it is expressed in grams per mole (g/mol).
The relationship can be described by the following equation:
Mass = Number of moles × Molar mass
Mathematically, it can be represented as:
m = n × M
Where: m is the mass of the substance in grams, n is the number of moles, M is the molar mass of the substance in grams per mole.
This equation allows you to calculate the mass of a substance if you know the number of moles and the molar mass, or vice versa.
For example, if you have 2 moles of a substance with a molar mass of 20 g/mol, you can calculate the mass as follows:
Mass = 2 moles × 20 g/mol = 40 grams
Similarly, if you have 50 grams of a substance with a molar mass of 10 g/mol, you can calculate the number of moles:
Number of moles = 50 grams / 10 g/mol = 5 moles
So, the relationship between mass and the number of moles depends on the molar mass of the substance.