How many grams of NH3 are produced when 890.1 grams of N2 gas react according to the following balanced chemical equation?: N2+3H2 -> 2NH3

i believe the answer is three water molecules

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.