Question

what is the molar mass for o2?

Explanation:

Step1: Recall molar mass of O atom

The molar mass of one oxygen (O) atom is approximately $15.999\ \text{g/mol}$.

Step2: Calculate molar mass of O₂

Since $\ce{O2}$ has 2 oxygen atoms, we multiply the molar mass of one O atom by 2: $2\times15.999\ \text{g/mol} = 31.998\ \text{g/mol}$.

Answer:

31.998 g/mol (the option with this value, e.g., if the green option is 31.998 g/mol, then the answer is the green - colored option with text "31.998 g/mol")