Final answer:
To find the number of grams of sodium in a 3.93×10¹g sample of NaHCO₃, divide the given mass by the molar mass of NaHCO₃ to convert grams to moles. Finally, multiply the number of moles by the molar mass of sodium to determine the grams of sodium.
Step-by-step explanation:
To find the number of grams of sodium in a 3.93×10¹g sample of NaHCO₃, we need to calculate the molar mass of NaHCO₃ and convert grams to moles. The molar mass of NaHCO₃ is 84.007 g/mol. To convert grams to moles, we divide the given mass by the molar mass:
3.93×10¹g / 84.007 g/mol = 4.68×10⁻¹ mol
Finally, to find the number of grams of sodium, we multiply the number of moles by the molar mass of sodium:
4.68×10⁻¹ mol × 22.990 g/mol ≈ 10.72 g
Therefore, approximately 10.72 grams of sodium are present in the given sample of NaHCO₃.