Question

molar mass of k20

Answer 1

To calculate the molar mass of potassium oxide (K₂O), you need to know the atomic masses of potassium (K) and oxygen (O):

- Atomic mass of potassium (K) ≈ 39.10 g/mol
- Atomic mass of oxygen (O) ≈ 16.00 g/mol

The formula for potassium oxide is K₂O, which means it contains 2 potassium atoms and 1 oxygen atom.

Calculating the molar mass:

\[
\text{Molar mass of K₂O} = (2 \times \text{atomic mass of K}) + (1 \times \text{atomic mass of O})
\]
\[
= (2 \times 39.10 \, \text{g/mol}) + (1 \times 16.00 \, \text{g/mol})
\]
\[
= 78.20 \, \text{g/mol} + 16.00 \, \text{g/mol}
\]
\[
= 94.20 \, \text{g/mol}
\]

Therefore, the molar mass of K₂O is approximately **94.20 g/mol**.