Question

5. Calculate the mass of an atom of copper(Cu=64)​

Answer 1

Hope this answer help you and also it make me brainlist

atom of

Cu

has a mass of

1.055

×

10

−

22

g

.

Explanation:

1 atom Cu

⋅

1 mol Cu

6.022

×

10

23

atoms Cu

⋅

63.546 g Cu

1 mol Cu

=

1.055

×

10

−

22

g Cu

1 atom of copper must be converted in moles to express it as a quantity that can be converted into grams (our second step).

Avogadro's Number

(

1 mole

=

6.022

×

10

23

particles

)

and the relative atomic mass of copper

(

1 mole of copper = 63.546 g

)

are the equalities required to make this conversion.

Copper has only two naturally occurring isotopes, Cu - 63 and Cu - 65.

Answer 2

Answer:

Copper has two stable isotopes 6329Cu (atomic mass = 62.93 amu; 69.09% natural abundance) and 6529Cu (atomic mass = 64.9278 amu; 30.91 % natural abundance). Calculate the average atomic mass of copper. Each isotope contributes to the average atomic mass based on its relative abundance.