Select the correct answer.
for the closed system below:
cu(s) + 2ag (aq) = 2ag(s) + cu2+(aq)
how would you know if the system is at equilibrium?
a. the mass of cus) remains constant.
b. [ag(s)] = [ag]
c. [cu2+] = [cu(s)]
d.
[cu2+] = [agt1
reset
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the answer to your question is c

the answer is option a.

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.