Question

Which of the following numerical expressions gives the number of particles in 2.0 g of Ne?

Answer 1

Answer:

$6.022*10^{22}$

Explanation:

• 1 mole of any substance contains Avogadro number of particles i.e,  6.022 × 10^23 particles.

• number of of particles in n moles of a substance = n*Avogadro number

• number of moles of Ne in 2.0 g of Ne= 2/20=0.1

[number of moles=given weight/ gram molecular weight]

• so, number of particles in 2.0 g of Ne = number of particles in 0.1 moles of Ne= 0.1(6.022 × 10^23)

=$6.022*10^{22}$