June 2023 NY Regents Chemistry Exam

50 Given the nuclear equation and isotopic masses:

What is the amount of mass converted to energy as a result of the reaction between the two reactant nuclei?

(1) 0.0239 u

(2) 4.0265 u (3) 8.0052 u

(4) 16.0343 u

Solution: Lets calculate the total mass on the left side of the equation. It is 6.0151+2.0140 = 8.0291u

On the right side we have 2(4.0026u)=8.0052u

The difference in mass (that will be converted into energy) is 8.0291u -8.0052u = 1

Answer: 1

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