Question

Estimate charge on all the electrons in 10 g of Cu penny?


​

Answer 1

Answer:

1 mole of Cu consists of 6.022 x 10^23 atoms.

Atomic mass of Cu = 63.546 g/mole

10g = 10/63.546 = 0.1573 moles

Therefore 0.1573 consists of

0.1573 x 6.022 x 10^23 atoms = 0.945 x 10^23 atoms

Since atomic number of copper is 29, each atom of copper consists of 29 electrons and 29 protons which are negative and postive charges respectively.

So 0.945 x 10^23 will contain

29 x 0.954 x 10^23 = 27.666 x 10^23

which is same as number of protons.

Charge of electron(Negative charge)= -1.602 x 10^(-19) columbs

Total - ve charge = 27.666 x (-1.602) x 10^4

= - 44.32 x 10^4 columbs

Similarly do for protons. And add the ans you get with the above figure.

Charge of proton(Positive charge)= 1.602 x 10^(-19) columbs

Explanation:

plzz brainliest

Answer 2

Answer:

1 mole of Cu consists of 6.022 x 10^23 atoms. 

Atomic mass of Cu = 63.546 g/mole

10g = 10/63.546 = 0.1573 moles

Therefore 0.1573 consists of 

0.1573 x 6.022 x 10^23 atoms = 0.945 x 10^23 atoms

Since atomic number of copper is 29, each atom of copper consists of 29 electrons and 29 protons which are negative and postive charges respectively.

So 0.945 x 10^23 will contain 

29 x 0.954 x 10^23 = 27.666 x 10^23

which is same as number of protons.

Charge of electron(Negative charge)= -1.602 x 10^(-19) columbs

Total - ve charge = 27.666 x (-1.602) x 10^4

= - 44.32 x 10^4 columbs

Similarly do for protons. And add the ans you get with the above figure.

Charge of proton(Positive charge)= 1.602 x 10^(-19) columbs

Hope this helps you.

Please mark me as brainliests answer.