Question

Calculate the number of Li atoms in 7.1 mol of Li

Express your answer using two significant figures.

Answer 1

To calculate the number of Li atoms in 7.1 mol of Li, multiply the number of moles by Avogadro's number.

Step-by-step explanation:

To calculate the number of Li atoms in 7.1 mol of Li, we can use Avogadro's number, which is approximately 6.022 × 1023 particles per mole. First, convert the given amount of moles to atoms by multiplying it by Avogadro's number:

Number of Li atoms = 7.1 mol × (6.022 × 1023 atoms/mol) = 4.287 × 1024 Li atoms

Therefore, there are approximately 4.3 × 1024 Li atoms in 7.1 mol of Li.

Learn more about Calculating the number of atoms in a given amount of substance