Question

How do you calculate mole

Answer 1

To calculate the number of moles, you can use the formula:

\[ \text{Number of moles} = \frac{\text{Mass of substance (in grams)}}{\text{Molar mass of substance (in grams/mol)}} \]

This formula allows you to find the amount of substance (in moles) based on its mass and the molar mass of the substance. Molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol). It is calculated by adding up the atomic masses of all the atoms in a molecule.

For example, if you have 50 grams of water (H₂O), you can calculate the number of moles using its molar mass. The molar mass of water is approximately 18.015 g/mol (2 hydrogen atoms with a molar mass of ~1.008 g/mol each, and 1 oxygen atom with a molar mass of ~16.00 g/mol).

\[ \text{Number of moles of water} = \{50 \grams}}{18.015 \{ g/mol}} \approx 2.78 \{ moles} \]

Answer 2

Step-by-step explanation:

In what situation?

One mole = 6.022 x 10^23 particles

this is the number of atoms of the mole weight of a substance on the periodic table .

example: Oxygen mole weight 15.999

there is 6.022 x 10^23 atoms of O in 15.999 gm of O