What is Calculate the number of Li atoms in 6.6 moles of Li.?

To calculate the number of lithium (Li) atoms in 6.6 moles, you can use Avogadro's number, which is approximately (6.022 \times 10^{23}) atoms per mole. Multiply the number of moles by Avogadro's number:

[6.6 , \text{moles} \times 6.022 \times 10^{23} , \text{atoms/mole} \approx 3.97 \times 10^{24} , \text{Li atoms}.]

Thus, there are approximately (3.97 \times 10^{24}) lithium atoms in 6.6 moles of Li.