Idon't understand conversion factors

1. There are 41.99 grams in 4.5 moles of sodium fluoride.

2. There are 1.26 moles in 98.3 grams of aluminum hydroxide.

3. There are 5 grams in 0.02 moles of beryllium iodide.

4. There are 0.70 moles in 68 grams of copper (II) hydroxide.

5. There are 0.064 grams in 2.3x10^-4 moles of calcium phosphate.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

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.