How many moles are in 12.0 grams of Potassium Sulfide?
mol = grams/molar mass
thanx bunches!!! @(^_^)@
To determine the number of moles in 12.0 grams of Potassium Sulfide, we need to use the molar mass of the compound.
The molar mass of Potassium Sulfide (K2S) can be found by adding the atomic masses of its constituent elements.
- The atomic mass of Potassium (K) is approximately 39.10 grams/mole.
- The atomic mass of Sulfur (S) is approximately 32.07 grams/mole.
Since there are two potassium atoms and one sulfur atom in each molecule of Potassium Sulfide, we can calculate the molar mass as follows:
Molar mass of K2S = (2 x atomic mass of K) + atomic mass of S
= (2 x 39.10 g/mol) + 32.07 g/mol
= 78.20 g/mol + 32.07 g/mol
= 110.27 g/mol
Now, to find the number of moles, we can use the following formula:
Number of moles = Mass / Molar mass
Substituting the values, we get:
Number of moles = 12.0 g / 110.27 g/mol
≈ 0.109 moles
Therefore, there are approximately 0.109 moles in 12.0 grams of Potassium Sulfide.