An 12.1 mg sample of a gas has a volume of 255cm3 at a tempature of 25.0 C and a pressure of 1300 Pa determine its molar mass

there all right good

explanation:

yes

ya te ayud espera

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.