Question

Find the mole of 0.25 gram of oxygen​

Answer 1

Given mass of Oxygen = 0.25 g

Molar mass of Oxygen = 16 g

We know,

$\boxed{Molar \ mass = \frac{Mass_{given}}{Mass_{molar}}}$

⇒ No. of moles = (0.25 g)/(16 g)

⇒ No. of moles = 0.015625 mol (answer).

Extra formula:-

• $No. \ of \ atoms/molecules = No. \ of \ moles \times N_O$.
• Mole means of a "pile or heap". This was introduced by Wilhelm Ostwald.
• Avogadro constant is equal to the number of atoms present in 12 grams of Carbon - 12 isotope.