How many atoms are in 191 g of calcium

The Atoms  in 191 g of calcium is atoms Ca

Explanation:

To calculate the number of atoms of Ca in 191 g Ca.

Convert the given mass of calcium to moles of calcium,  

Using its molar mass (referring to a periodic table, this is 40.08gmol):

191g Ca× =4.765 mol Ca

Using Avogadro's number, particles mol, calculate the number of atoms present

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