Question

The total number of calcium atoms in 80.0 grams of calcium

Answer 1

Answer:

2NA = 12.044 × 10^23

Explanation:

We know,

molar mass of Ca = 40 gram

therefore, number of moles of Ca = given weight /molar mass

= 80/40 = 2 moles.

Therefore, no. of atoms = 2 × 6.022 × 10^ 23 = 12.044 × 10^23