Question

Calculate the mass of one atom of oxygen (atomic mass=16amu

Answer 1

Answer:-

2.65×10⁻²³g

Explanation:-

Since, atomic mass of Oxygen is given as 16amu, thus it's molar mass will be

16g/mol.

• Avogadro Number = 6.022×10²³

Firstly, let's calculate the number of moles.

∵ No of atoms:-

= No of moles × Avogadro Number

∴ No of moles

= No of atoms / Avogadro Number

= 1/6.022×10²³ moles

[ We are not converting the numver of moles into decimal form for simplification of calculations in the next step ]

Now, we know that:-

=> Mass = No of moles × Molar mass

=> Mass = 1/6.022×10²³ × 16

=> Mass = 16/6.022×10²³

=> Mass = 2.65/10²³

=> Mass = 2.65×10⁻²³ g

Thus, mass of one atom of Oxygen is

2.65×10⁻²³g.