Atoms and Molecules

Q2. One mole of O₂ and one mole of N₂ contain different numbers of molecules.

Q3. One mole contains 6.022 × 10^23 particles.

Q4. An element can be broken into simpler substances by ordinary chemical methods.

Q5. An empirical formula shows the simplest whole-number ratio of atoms.

Q6. At conventional STP, one mole of gas occupies about 22.4 L.

Q7. Avogadro number represents the number of particles in one mole.

Q8. A compound contains elements combined chemically in fixed proportions.

Q9. A molecule can consist of two or more atoms.

Q10. Molar mass can be expressed in g mol⁻¹.