Which one of the following statements is true concerning the reaction where has a mass of 2.014 u; has a mass of 4.003 u; has a mass of 6.015 u; and 1 u = 931.5 MeV?
A)The reaction releases 14 MeV.
B)The reaction releases 21 MeV.
C)The reaction releases 36 MeV.
D)The reaction requires 14 MeV to occur.
E)The reaction requires 21 MeV to occur.

Question

Which one of the following statements is true concerning the reaction  where  has a mass of 2.014 u;  has a mass of 4.003 u;  has a mass of 6.015 u; and 1 u = 931.5 MeV?
A)The reaction releases 14 MeV. 
B)The reaction releases 21 MeV. 
C)The reaction releases 36 MeV. 
D)The reaction requires 14 MeV to occur. 
E)The reaction requires 21 MeV to occur.

Quizplus · Accepted Answer

The initial mass before the reaction is (2.014 + 4.003 + 6.015)u = 12.032u
The final mass after the reaction is (1.007276 + 9.012183)u = 10.019459u
The mass difference is 2.012541u
Using E=mc^2, the energy released is (2.012541u)(931.5 MeV/u) = 1875.62 MeV = 1.87562 GeV
Therefore, the reaction releases 1.87562 GeV = 21 MeV.

Which One of the Following Statements Is True Concerning the Reaction