4. A large quantity of a reactant that precipitates solid gold from gold in solution was added to a large sample of ocean water, but only a trace amount of solid gold resulted after filtering the mixture. What do you think could be the problem?
Describe one of the reactants as a limiting reagent in your answer.

wher is the rest of the question

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.