Question

What is the number of

nitrogen atoms in 12.0 g of
CO(NH2)?
[Avogadro constant = 6.02
x 1023 moll; Molar mass of
CO(NH2) = 60 g mol']​

Answer 1

1.2 x 10²³atoms

Step-by-step explanation:

Given parameters:

Mass of CO(NH₂) = 12g

Unknown:

Number of Nitrogen atoms = ?

Solution:

Given compound;

CO(NH₂);

In;

1 mole of CO(NH₂), we have 1 mole of N

let us find the number of moles of CO(NH₂);

Number of moles =
`(mass)/(molar mass)`

Number of moles =
`(12)/(60)` = 0.2moles

Since

1 mole of CO(NH₂), we have 1 mole of N

0.2 mole of CO(NH₂) will have 0.2mole of N

1 mole of a substance contains 6.02 x 10²³ atoms

0.2 mole of N will contain 0.2 x 6.02 x 10²³ atoms = 1.2 x 10²³atoms