Calculate the mass of 1 oxygen atom and oxygen molecules in kg (O=16).

To find the mass of a single oxygen atom and an oxygen molecule, we need to start with the atomic mass of oxygen, which is given as 16 atomic mass units (amu). Let's break this down step by step.

Mass of a Single Oxygen Atom

The atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale. One amu is defined as one twelfth of the mass of a carbon-12 atom. For oxygen, with an atomic mass of 16 amu, we can convert this into kilograms.

Conversion from amu to kg

To convert atomic mass units to kilograms, we use the conversion factor:

• 1 amu = 1.66053906660 × 10^-27 kg

Now, we can calculate the mass of one oxygen atom:

Mass of one oxygen atom:

Mass = 16 amu × (1.66053906660 × 10^-27 kg/amu)

Mass = 2.656 × 10^-26 kg

Mass of an Oxygen Molecule

An oxygen molecule (O₂) consists of two oxygen atoms. Therefore, to find the mass of an oxygen molecule, we simply multiply the mass of one oxygen atom by 2.

Calculating the Mass of O₂

Mass of one oxygen molecule:

Mass of O₂ = 2 × (Mass of one oxygen atom)

Mass of O₂ = 2 × (2.656 × 10^-26 kg)

Mass of O₂ = 5.312 × 10^-26 kg

Summary of Results

In summary, the mass of a single oxygen atom is approximately 2.656 × 10^-26 kg, while the mass of an oxygen molecule (O₂) is about 5.312 × 10^-26 kg. These calculations help us understand the scale of atomic and molecular masses in the context of chemistry and physics.