2. Classify the following solutions as acidic, basic, or neutral at 25OC.
a. pH = 13.00
b. [H3O+] = 1.0 x 10-12 M
c. pOH = 5.00
d. [OH-]= 1.0 x 10-9M

a) pH = 13.00 : basic

b) : basic

c) pOH = 5.00 : basic

d) : acidic

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

Acids have pH ranging from 1 to 6.9 and bases have pH ranging from 7.1 to 14.Neutral substances have pH of 7.

a) pH = 13.00

As pH is more than 7, the solution is basic.

b)  

Putting in the values:

As pH is more than 7, the solution is basic.

c) pOH = 5.00

As pH is more than 7, the solution is basic.

d)

Putting in the values:

As pH is less than 7, the solution is acidic.

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.  

answerapplication program;