0.567 moles NaHCO3 (3mol O/1mol NaHCO3)(6.022 X 10^23/1mol O)
= 1.02 X 10^24 atoms of oxygen.
To find the mass of C6H8O7 needed to consume 0.42g of NaHCO3, you first need to balance the chemical equation for the reaction between them. Then, calculate the molar ratio between NaHCO3 and C6H8O7 to determine the mass needed. This involves stoichiometry and molar mass calculations to find the answer.
19999998888888777777766666666
0.24
0.0050 mols