Calculate the number of LiLi atoms in 8.9 molmolof Li.

Express your answer using two significant figures.

5.35×10²⁴ atoms of Li

Explanation:

To solve this we apply this rule of three:

We know that 1 mol contains 6.02×10²³ atoms

Therefore, 8.9 moles must contain (8.9 . 6.02×10²³) / 1 = 5.35×10²⁴ atoms

One mol is the amount of substance containing as many elemental entities as atoms, which are contained in 12 g of the C¹² isotope

In conclussion 6.02×10²³ atoms of C¹² isotope weighs 12 g

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