Question

Calculate the number of Calcium atoms in 2.5 moles of Calcium?

Answer 1

2.5 Na atoms in calcium

Answer 2

process:

1mole of calcium contain-----------6.023×10^23

2.5 contain ------------- ???

$\frac{2.5}{1} \times 6.023 \times {10}^{23}$

=15.0575