1. Find the molar mass of lithium:
* The molar mass of lithium (Li) is 6.941 g/mol (you can find this on the periodic table).
2. Calculate the number of moles of lithium:
* Divide the given mass by the molar mass:
* moles of Li = 11.8 g / 6.941 g/mol = 1.70 mol
3. Convert moles to atoms using Avogadro's number:
* Avogadro's number is 6.022 x 10^23 atoms/mol
* Multiply the number of moles by Avogadro's number:
* atoms of Li = 1.70 mol * 6.022 x 10^23 atoms/mol = 1.02 x 10^24 atoms
Therefore, there are approximately 1.02 x 10^24 atoms of lithium in 11.8 g.
