Determine how many grams of one of the chemicals that you investigated in the experiment are required to achieve the following temperature: hot pack, 55° C (131° F) The chemical in question is Na2CO3. The other substance in a hot pack would be water. How do I calculate the amount of Na2CO3 that is needed to heat water up to 55° C?

hurricanes form in warm water

they are all solids.

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.