Ca(OH)2 + 2HCl → CaCl2 + 2H2O. In an experiment, 210.5g of HCl reacts with 235.75g of Ca(OH)2. a. Which reactant is the limiting reactant of CaCl2?
b. What is the theoretical yield of CaCl2?
c. If 291.53g of CaCl2 are produced, what is the percent yield?

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.