Question

Calculate molecules in 1dm^3 of oxygen

Answer 1

Number of molecules in 1 dm³ Oxygen = 2.71 x 10²²

Further explanation

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

1 dm³ of oxygen = 1 L Oxygen

• mol Oxygen :

`\tt (1)/(22.4)=0.045`mol`

• molecules of Oxygen :

n=mol=0.045

No = 6.02.10²³

`\tt N=n* No\\\\N=0.045* 6.02* 10^(23)\\\\N=2.71* 10^(22)`