First we need to calculate molar mass of <span>NaHCO3. Molar mass is mass of 1 mole of a substance. It is the sum of relative atomic masses, which are masses of atoms of the elements.
Relative atomic mass of Na is 22.99 g </span><span>Relative atomic mass of H is 1 g </span><span>Relative atomic mass of C is 12.01 g </span><span>Relative atomic mass of O is 16 g. </span> Molar mass of <span>NaHCO3 is: 22.99 g + 1 g + 12.01 g + 3 </span>· <span>16 g = 84 g
Now, mass of oxygen in </span><span>NaHCO3 is: 3 </span>· 16 g = 48 g
mass percent of oxygen in <span>NaHCO3: 48 g </span>÷ 84 g · 100% = 57.14%
Therefore, <span>the mass percent of oxygen in sodium bicarbonate is 57.14%.</span>
