A plant is burning limestone which analyzes 52% CaO, 41% CO2 and 7% inerts using coke that analyzes 90% C and 10% ash. The lime product obtained contains 3% CO2 and 1% unburned C. The top gas shows 24.1% CO2, 1% CO ad 74.9% N2. a. The kg limestone/kg coke is about .

b. The lime-fuel ratio is about .

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.  

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".