Question

A sample of 1.7×10^23 molecules of silicon is ____ moles.​

Answer 1

0.28moles of silicon

Step-by-step explanation:

Given parameters:

Number of molecules of silicon = 1.7 x 10²³molecules

Unknown:

Number of moles of the silicon = ?

Solution:

A mole of any substance contains the Avogadro's number of particles.

1 mole of a substance contains 6.02 x 10²³molecules;

So;

1.7 x 10²³molecules contains
`(1.7 x 10^(23) )/(6.02 x 10^(23) )` = 0.28moles of silicon