Question

The mass of one atom of chlorine is

• A. $\frac{1}{6.022\times {10}^{23}}g$
• B. $\frac{71}{6.022\times {10}^{23}}g$
• C. $\frac{35.5}{6.022x{10}^{23}}g$
• D. $71u$

Answer 1

The correct option is C

$\frac{35.5}{6.022x{10}^{23}}g$

One mole of Chlorine(Cl) atom has a mass of 35.5 g.

One mole of chlorine atom has Avogadro's number of atoms of chlorine = 6.023 X 10²³ atoms

Therefore, 6.023 X 10²³ atoms of chlorine have mass= 35.5 g

1 atom of chlorine has mass= $\frac{35.5g}{6.023X{10}^{23}}$

Hence option (c) is correct.