Question

How many molecules of O2 are in 8.0 g of oxygen? If the O2 molecules were completely split into O (Oxygen atoms), how many mole of atoms of oxygen would be obtained?

Answer 1

Dear Student,

◆ Answer -

• Number of O2 molecules = 1.505×10^23 molecules
• Moles of O atoms = 0.5 mol

● Explaination -

Moles of O2 are -

n(O2) = W / M

n(O2) = 8 / 32

n(O2) = 0.25 mol

No of O2 molecules are -

N(O2) = n(O2) × NA

N(O2) = 0.25 × 6.022×10^23

N(O2) = 1.505×10^23 molecules

If all O2 molecules are split into O-atoms, moles of O-atoms are

n(O) = 2 × n(O2)

n(O) = 2 × 0.25

n(O) = 0.5 mol

Thanks dear...