🤓 Based on our data, we think this question is relevant for Professor Fakhreddine's class at TEXAS.
We can use the mass ratio given in the table to calculate the mass of O when the mass of H = 1.00g. Since 1.00g stands for the atomic mass of Hydrogen, the calculated value will be the atomic mass of O as well. Take note that this should not match the values in the periodic table because this is the old system that they used to get a relative atomic mass and as we can see the assumed formula was wrong.
Early tables of atomic weights (masses) were generated by measuring the mass of a substance that reacts with 1.00 g of oxygen. Given the following data and taking the atomic mass of hydrogen as 1.00, generate a table of relative atomic masses for oxygen, sodium, and magnesium.