The atomic mass of carbon monoxide (CO) can be calculated by adding the atomic masses of its constituent elements: carbon (C) and oxygen (O).
Carbon has an atomic mass of approximately 12.01 atomic mass units (amu), while oxygen has an atomic mass of about 16.00 amu. Since carbon monoxide consists of one carbon atom and one oxygen atom, we add these two values together:
Atomic mass of CO = Atomic mass of C + Atomic mass of O
Atomic mass of CO = 12.01 amu + 16.00 amu = 28.01 amu
Therefore, the atomic mass of carbon monoxide is approximately 28.01 amu. This value is important in chemistry, especially when dealing with gas reactions and calculations involving molar masses.