I found this question a bit confusing. Anyone who can help out with these answers.Your help is appreciated

In a main sequence star such as our Sun, a fusion reaction is ongoing that releases energy: the

pp chain, in which four hydrogen-1 nuclei (single protons) become one helium nucleus (alpha

particle). The resulting mass is less than the initial mass: this ‘mass loss’ is the source of Sun’s

energy which can be calculated from the equation: E= m*c

2 , where E is the energy released;

m is the ‘missing’ mass; and c is the speed of light, 3.0 * 105 km/s. The mass of one proton is

1.008 a.m.u (atoms mass unit: the mass of a carbon-12 nucleus is defined to be 12 a..m.u). The

mass of a helium-4 nucleus is 4.003 a.m.u: there is a deficit. 1 a.m.u = 1.66*10-27 kg and it is

estimated that 3.6 ×1038 protons are converted into helium nuclei every second.

A. What is the energy released in a single reaction where four protons ->

**one He nucleus?**

B. What is the power output of Sun? (3 marks)

Power **= **(number of reactions per second) X (energy released per reaction)