Question

How many grams of neon will have the same number of atoms as 4 g of calcium?

Answer 1

.......Mass of 1 atom of Ne = 20/6.022*10²³ g
Now,
Number of particles in 4 g of Ca,
= 4/40*6.022*10²³
= 6.022*10²² atoms
Therefore, number of atoms of Ne same as 4 g of Ca
= 20*6.022*10²²/6.022*10²³
=20/10
=2 g

I hope.its help you

Answer 2

Number of particles in 4 g of Ca,

= 4/40×6.022×10²³

= 6.022×10²² atoms

Therefore, number of atoms of Ne same as 4 g of Ca

= 20×6.022×10²²/6.022×10²³

=20/10

=2 g