Question

Calculate the number of atoms in 20 grams of calcium .
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Answer 1

Answer:

niger

Explanation:

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Answer 2

Answer:

1 calcium atom = 40 amu

20 grams of calcium atom = 20/40 = 0.5

Now, we know 1 atom = 6.022 × 10^23 mol^-1

.•. Number of atoms in 20g of calcium =

0.5 × 6.022 × 10^23 = 3.011 × 10^23 mols