How many atoms are in a sample of silver if the sample had a mass of 1243 g ?

69.37×10²³ atoms of silver

Explanation:

Given data:

Mass of sample = 1243 g

Number of atoms of silver = ?

Solution:

Number of moles of silver:

Number of moles = mass/molar mass

Number of moles = 1243 g/ 107.87 g/mol

Number of moles = 11.52 mol

Number of atoms:

According to Avogadro Law,

1 mole contain 6.022×10²³  atoms

11.52 mol × 6.022×10²³  atoms / 1mol

69.37×10²³ atoms

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