Question

3. You have 3.6 x 10^24 particles of LiBr. How many moles are present?

Answer 1

1) List the known quantities.

Sample: 3.6 x 10^24 parcicles of LiBr

Avogadro's number: 6.022*10^23 particles

2) Set the equation.

1 mol LiBr = 6.022*10^23 molecules LiBr

$mol\text{ }LiBr=3.6*10^{24}\text{ }molecules\text{ }LiBr*\frac{1\text{ }mol\text{ }LiBr}{6.022*10^{23}\text{ }molecules\text{ }LiBr}=5.978\text{ }mol\text{ }LiBr.$

3.6*10^24 molecules LiBr is equal to 5.98 mol LiBr.