A certain mass of a gas occupies a volume of 2 liters at STP, keeping the pressure constant. At what temperature would the gas occupy a
volume of 4 liters?

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.  

its pwirhfpiwe

explanation:

because dgjpwojefopjwp

im doing test rn im going with 2 but ill give answer if itss wrong,   : )