The mass of a proton is 1.00728 atomic mass units (amu) and the mass of a neutron is 1.00867 amu. What is the mass defect (in amu) of a nucleus whose nuclear mass is 59.9338 amu? What is the mass defect in kilograms? What is the energy equivalent of this mass in kilojoules?
Confused on how to start.
I know i multiply m by c^2.

Question

The mass of a proton is 1.00728 atomic mass units (amu) and the mass of a neutron is 1.00867 amu. What is the mass defect (in amu) of a nucleus whose nuclear mass is 59.9338 amu? What is the mass defect in kilograms? What is the energy equivalent of this mass in kilojoules?
Confused on how to start. 
I know i multiply m by c^2.

anonymous · Answer

So would I add the mass of the proton and neutron onto the nuclear mass - then do the formula to find the total mass in Kilojoules?

anonymous · Answer

59.94975+1.00867+1.00729 = 61.94975
61.94975*(3*10^8)^2 = 5.575 *10^18?
That would be the mass in KJ? maybe? lol

chmvijay · Answer

that's not mass defect

chmvijay · Answer

they haven't mentioned about which element hey are dealing with  PLZ check once again ?

chmvijay · Answer

*they

anonymous · Answer

the mass nucleus of 60/27 Co nucleus - sorry not sure how that got left out!

anonymous · Answer

60 Co 
27

chmvijay · Answer

LOL where di u leave this

chmvijay · Answer

*did

anonymous · Answer

The mass of a proton is 1.00728 atomic mass units (amu) and the mass of a neutron is 1.00867 amu. What is the mass defect (in amu) of a 60/27 Co nucleus  whose nuclear mass is 59.9338 amu? What is the mass defect in kilograms? What is the energy equivalent of this mass in kilojoules?

anonymous · Answer

OOps added it back in!

chmvijay · Answer

ok now in 60 Co 27 can u tell me the no of protons and neutrons ?

anonymous · Answer

How would I figure that out?

chmvijay · Answer

no of protons = no of electrons = atomic no of element

chmvijay · Answer

LOL u have forgotten the fundamental of chem or what ?

anonymous · Answer

33 neutrons and 27 protons?

anonymous · Answer

The sum of both of those is 60.48247 right? By multypign each by their atomic mass?

chmvijay · Answer

yaaa

chmvijay · Answer

60.4847- 59.9338 = mass defect :) in amu unit

anonymous · Answer

.5509 - how do i convert to amu units?

chmvijay · Answer

now convert Amu unit to joules

anonymous · Answer

0.5509 to joules? So 0.5509 * (3*10^8)^2 = 4.958 *10^-16?

chmvijay · Answer

1MeV = 10^6 eV = 1.6 *10^(-13) J
but 1 amu =931.5 MEV

anonymous · Answer

OH so I use 931.5 as the mass?
I'm a bit confused

chmvijay · Answer

0.5509*931.5* 1.6 *10^(-13) 
gives ur answer in J LOL

anonymous · Answer

So the final answer would be 8.21*10^-11 joules of energy?

anonymous · Answer

and the mass defect would be 931.5? Or are the final answer and the mass defect the same thing? Sorry just a bit confused!

anonymous · Answer

@chmvijay whenever ya get time could you double check me up there ^^ thanks :)

chmvijay · Answer

how come ?  8.21*10^-11

anonymous · Answer

Is that the complete answer for the question? I'm just confused!  8.21*10^-11

anonymous · Answer

Thanks for all of your help!