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

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year