Question

Mass of one mole of electrons is *

2 points

(a) 5.486 x 10⁻⁷

(b) 4.436 x 10-⁶

(c) 4.486 x 10⁻⁷

(d) 5,086 x 10⁻⁵

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Answer 1

Answer:

please make all your questions 25

Explanation:

Mass of one mole of electrons is 9.11×10

−31

×6.023×10

23

=5.486×10

−7

kg.

Charge of 1 mole of electrons is 1.602×10

−19

×6.023×10

23

=9.647×10

4

C.

Answer 2

1 electron weighs approximately 9.11×10-³¹ Kg

1 mol weighs X Kg

1 mol is6.022×10²³ particles

So we put 6.022×10²³ in the equation instead.

X= 9.11 x 10³¹ / 1×6.022×10²³

=5.48×10^ -7 Kg

∴ mass of one electron =0.548mg

so, A option is correct..