Question

How many molecules are in 0.0740 mol NH3?

Answer 1

Number of molecules NH₃ = 4.45 x 10²²

Further explanation

A mole is a number of particles(atoms, molecules, ions) in a substance

This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mol of NH₃ = n = 0.074

So the number of molecules :

`\tt N=n* No\\\\N=0.0740* 6.02* 10^(23)\\\\N=4.45* 10^(22)`