Question

1. what is the molar mass of oxygen (o)?

6.02 × 10²³ g/mol
16.0 g/mol
8.0 g/mol
32.0 g/mol
clear all

Explanation:

Step1: Recall molar mass of an element

The molar mass of an element is numerically equal to its atomic mass (in atomic mass units) and has a unit of g/mol. For oxygen (O), the atomic mass from the periodic table is approximately 16.0 amu. So, the molar mass of O is 16.0 g/mol.

Step2: Analyze the options

• \(6.02\times 10^{23}\space g/mol\) is Avogadro's number (not molar mass of O).
• \(16.0\space g/mol\) matches the molar mass of O.
• \(8.0\space g/mol\) is incorrect (half of O's molar mass, maybe confused with something else).
• \(32.0\space g/mol\) is the molar mass of \(O_2\) (oxygen molecule), not O atom.

Answer:

The correct option is the one with \(16.0\space g/mol\) (the option labeled with \(16.0\space g/mol\)).