What is the mass percent of oxygen in sodium bicarbonate(NaHCO3)?

To determine the mass percent of oxygen in sodium bicarbonate (NaHCO3), we need to calculate the mass of oxygen in one mole of sodium bicarbonate and then divide it by the molar mass of sodium bicarbonate. Here's how you can do it:

Step 1: Find the molar mass of sodium bicarbonate (NaHCO3):
- Sodium (Na) has a molar mass of 22.99 g/mol.
- Hydrogen (H) has a molar mass of 1.01 g/mol.
- Carbon (C) has a molar mass of 12.01 g/mol.
- Oxygen (O) has a molar mass of 16.00 g/mol.

So, the molar mass of sodium bicarbonate (NaHCO3) would be:
22.99 + 1.01 + 12.01 + (3 × 16.00) = 84.01 g/mol.

Step 2: Calculate the mass of oxygen in one mole of sodium bicarbonate:
Since there are three oxygen atoms in one mole of NaHCO3, multiply the molar mass of oxygen by 3:
3 × 16.00 = 48.00 g/mol.

Step 3: Find the mass percent of oxygen:
Divide the mass of oxygen by the molar mass of sodium bicarbonate and multiply by 100 to get the mass percent:
(48.00 g/mol ÷ 84.01 g/mol) × 100 = 57.12%.

Therefore, the mass percent of oxygen in sodium bicarbonate (NaHCO3) is approximately 57.12%.