## Hayatcakes 3 years ago proton help

1. Kryten

is that Co like Cobalt?

2. Hayatcakes

this is what i have so far The mass defect of a nucleus would be 0.56342 amu. The mass defect in kilograms is 9.355 × 10-28 kilograms.

3. Hayatcakes

Yes Co as in colbalt

4. Hayatcakes

I just need help on What is the energy equivalent of this mass in kilojoules?

5. shivam_bhalla

calculate the mass of cobalt due to protons and neutrons. Subtract the mass you get from 59.9338 . The remaining mass is mass defect (in amu). Convert this to kg For energy equivalent. Multiply the mass defect you get by 931.5 MeV to get your answer

6. Hayatcakes

The mass defect of a nucleus would be 0.56342 amu. The mass defect in kilograms is 9.355 × 10-28 kilograms. ^ am i correct?

7. Hayatcakes

931.5 MeV is the answer for energy equivalent.????

8. shivam_bhalla

Nope. (Mass defect * 931.5 MeV) is the answer for energy equivalent.

9. Hayatcakes

okay

10. shivam_bhalla

After you have done that. 1MeV = 10^6 eV = 1.6 *10^(-13) J

11. Hayatcakes

0.56342 x 931.5 = ?

12. Hayatcakes

is that how it should be?

13. shivam_bhalla

0.56342 x 931.5 x 1.6 *10^(-13)

14. shivam_bhalla

This is to get the answer in joules

15. Hayatcakes

8.39721168 × 10^-11?

16. Hayatcakes

17. shivam_bhalla

energy equivalent of this mass in joules = 8.39721168 × 10^-11 J Therefore What is the energy equivalent of this mass in kilojoules?

18. Hayatcakes

Im really confused..

19. shivam_bhalla

1 kilojoules = 10^3 joules Now try :)

20. Hayatcakes

ok

21. Hayatcakes

8.39721168 × 10^-14

22. shivam_bhalla

@Hayatcakes , you are right

23. shivam_bhalla

But make sure you always write the units while writing the answer