To find the mass of an oxygen molecule (O2) from its atomic weight and molecular weight, you can use the following relationship:
Mass of Oxygen molecule (O2) = (Molecular weight of O2) - (2 * Atomic weight of Oxygen)
The molecular weight of O2 can be determined by adding the atomic weights of the individual oxygen atoms in the molecule. The atomic weight of oxygen is found on the periodic table, which is approximately 16.00 atomic mass units (amu).
Let's calculate the mass of an oxygen molecule using this formula:
Molecular weight of O2 = 2 * Atomic weight of Oxygen = 2 * 16.00 amu = 32.00 amu
Now, we can substitute this value into the formula:
Mass of Oxygen molecule (O2) = 32.00 amu - (2 * 16.00 amu) = 32.00 amu - 32.00 amu = 0 amu
The calculated mass of an oxygen molecule is 0 amu. However, it's important to note that this result is not the actual physical mass of the oxygen molecule. The calculated value of 0 amu arises because the atomic weights and molecular weights used in this calculation are relative values based on the atomic mass unit (amu). The actual physical mass of an oxygen molecule is determined by experimental measurements and is not zero.