Question

Calculate the number of atoms of each type in 5.3 gram of sodium carbonate​

Answer 1

Number of atoms = number of moles x 6.02 x 10²³

Further explanation

The mole is the number of particles contained in a substance

1 mol = 6.02 x 10²³ particles

mol of Sodium carbonate​-Na₂CO₃

MW = 106 g/mol

• Na

mass Na

`\tt (2* 23)/(106)* 5.3=2.3`

mol Na

`\tt (2.3)/(23)=0.1`

number of atoms = 0.1 x 6.02 x 10²³ = 6.02 x 10²²

• C

mass C

`\tt (12)/(106)* 5.3=0.6`

mol C

`\tt (0.6)/(12)=0.05`

number of atoms = 0.05 x 6.02 x 10²³ = 3.01 x 10²²

• O

mass O

`\tt (3.16)/(106)* 5.3=2.4`

mol O

`\tt (2.4)/(16)=0.15`

number of atoms = 0.15 x 6.02 x 10²³ = 9.03 x 10²²