What is the mass, in grams, of 1.20x10^25 atoms of calcium?

The mass of calcium in the given number of atoms is 797.2 g.

Explanation:

N = Number of atoms/molecules

n = Moles of compound

= Avogadro number =

We have:

Number calcium atoms =

n = moles of calcium = ?

n = 19.93 mol

Atomic mass of calcium = 40 g/mol

Mass of 19.93 moles of calcium = 40 g/mol × 19.93 mol=797.2 g

The mass of calcium in the given number of atoms is 797.2 g.

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