A student is attempting to make up 500.0 mL of a 0.278 M solution of FeCl3 from a stock solution which has a molarity of 2.6 M. How much of the stock solution (in mL) will they need to add to a 500.0 mL volumetric flask to make up the 0.278 M solution?

it's all four options.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.