Answer to Question #137360 in General Chemistry for Oneah Duong

Question

how many molecules are in 2.7 moles?

Answer 1

Solution:

The Avogadro constant N_A= 6.022 × 10²³ units in one mole of any substance. The units may be electrons, atoms, ions, or molecules.

The number of particles of a substance can be calculated using the Avogadro constant N_A, the amount of substance in mole n.

Number of particles N = Avogadro constant N_A × amount n

N = 6.022×10²³ mol^-1 × 2.7 mol = 16.259×10²³ = 1.626×10²⁴

Answer: there are 1.626×10²⁴ molecules in 2.7 moles.