<u>Answer:</u> The number of oxygen atoms in given mass of sodium sulfate are
<u>Explanation:</u>
To calculate the number of atoms, we first need to find the number of moles of sodium sulfate. the equation used will be:
Molar mass of sodium sulfate 142g/mol
Given mass of sodium sulfate = 29.34g
Putting values in above equation, we get:
In 1 mole of sodium sulfate, 4 moles of oxygen atoms are present.
Number of oxygen atoms present in 1 mole of sodium sulfate will be
So, in 0.206 mol of sodium sulfate, the number of oxygen atoms will be =
Hence, the number of oxygen atoms in given mass of sodium sulfate are