Final answer:
To calculate the mass of 2.33x10²⁰ atoms of oxygen, divide the number of atoms by Avogadro's number and then multiply by the molar mass of oxygen.
Step-by-step explanation:
To calculate the mass of 2.33x10²⁰ atoms of oxygen, we need to first find the molar mass of oxygen. The molar mass of oxygen is 16.00 g/mol. Next, we can use the concept of moles to convert the number of atoms to moles. One mole of any element contains Avogadro's number of atoms, which is 6.022x10²³. Using this information, we can calculate the mass of 2.33x10²⁰ atoms of oxygen by dividing the number of atoms by Avogadro's number and then multiplying by the molar mass of oxygen.
Let's calculate the mass:
2.33x10²⁰ atoms of oxygen × (1 mole/6.022x10²³ atoms) × (16.00 g/mole) = X g
X = 7.69 ng (rounded to two decimal places)