Question

calculate the number of atom ineach of the following 1.2g calcium (atomic mass can=40)​

Answer 1

Answer:

40.

Explanation:

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Answer 2

Answer:

18.066 × 10^21 atoms

Explanation:

Molar mass of Ca = 40g

Given mass of Ca = 1.2g

No. of atoms present in 40g = 6.022 × 10^23

No. of atoms present in 1.2g = (1.2×6.022×10^23)/40

=18.066 × 10^21 atoms