Answer:
2.91 moles NH₃
Explanation:
To find the answer, you need to use Avogadro's number to convert between molecules and moles. It is important to arrange the ratio/conversion in a way that allows for the cancellation of units. The final answer should have 3 sig figs because the given value (1.75) also has 3 sig figs.
Avogadro's Number:
6.022 x 10²³ molecules = 1 mole
1.75 x 10²⁴ molecules NH₃ 1 mole
-------------------------------------- x ------------------------------------ = 2.91 moles NH₃
6.022 x 10²³ molecules
