The mass of 1 mole of electrons is :

Question

The mass of 1 mole of electrons is : (A)  9.1× 10-28 g  (B)  1.008 mg  (C)  0.55 mg  (D)  9.1× 10-27 g

Tardigrade Admin · Accepted Answer

One mole of electrons = 6.023 × 1023 electrons Mass of one electron = 9.1 × 10-28 g Mass of one mole of electrons = 6.032×1023 × 9.1 × 10-28 g = 5.48 × 10-4 g = 0.548 mg ≈ 0. 55 mg

Q. The mass of $1$ mole of electrons is :

$9.1 \times 1 0^{- 28} g$

$1.008 m g$

$0.55 m g$

$9.1 \times 1 0^{- 27} g$

One mole of electrons $= 6.023 \times 1 0^{23}$ electrons
Mass of one electron $= 9.1 \times 1 0^{- 28} g$
Mass of one mole of electrons
$= 6.032 \times 1 0^{23} \times 9.1 \times 1 0^{- 28} g$
$= 5.48 \times 1 0^{- 4} g = 0.548 m g \approx 0.55 m g$

Q. The mass of 1 mole of electrons is :

9.1×10−28g

1.008mg

0.55mg

9.1×10−27g