Question

How many atoms are in 3.5 moles of NaCl?

o 2.00 x 1026 atoms
o 2.88 x 1024 atoms
o 2.11 x 1024 atoms
o 2.75 x 1021 atoms​

Answer 1

2.11 ×10²⁴ atoms

Step-by-step explanation:

Given data:

Number of moles of NaCl = 3.5 mol

Number of atoms = ?

Solution:

It is known that 1 mole contain 6.022×10²³ atoms. The number 6.022×10²³ is called Avogadro number.

3.5 mol ×6.022×10²³ atoms / 1 mol

21.1 ×10²³ atoms

2.11 ×10²⁴ atoms