Question

How does the number of tin atoms in the sample compare to the number of aluminum atoms in a 20 gram sample of each (Sn:Al)

Answer 1

The number of Al atoms is greater than the number of Sn atoms

Further explanation

Given

20 gram sample of Tin and Aluminum

Required

Number of atoms

Solution

1 mol = 6.02 x 10²³ particles (atoms, molecules, ions)

So the number of atoms of each element is determined by the number of moles. The greater the number of moles the greater the number of atoms

• moles Sn-Tin(Ar = 118,71 u)

mol = mass : Ar

mol = 20 : 118,71 u

mol = 0.168

• moles of Al-Aluminum(Ar=26.9815 u)

mol = 20 : 26.9815 u

mol = 0.741

So the number of Al atoms > number of Sn atoms