A sample of seawater has a pH of 8. determine the new pH of the sample if the hydrogen ion concentration is increased by a factor of 100

Explanation:

pH = - log[H⁺]

8 = - log[H⁺]

[H⁺] = 10⁻⁸

if this concentration of hydrogen ion increases to  100 times

New hydrogen ion concentration

[H⁺] = 10⁻⁸ x 10²

= 10⁻⁶

pH = - log[10⁻⁶]

= 6

new pH will be 6 .

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.