Its b) reactant and the chemical energy of the
Respiratory system and circulatory system both are responsible to control the breathing in Human body.
When we have Kw = 1.2x10^-15
and according to Kw formula:
Kw = [OH-] [H+]
by substitution:
1.2x10^-15 = [OH-][H+]
when the solution is neutral that means:
[OH-] = [H+]
∴1.2X10^-15 = X^2
∴X = 3.46 x 10^-8
∴[OH-] = [H+] = 3.46x10^-8
Answer:
There are 6.024 grams of sodium hydroxide in the solution.
Explanation:


Moles of sodium hydroxide = n
Volume of sodium hydroxide solution = 251.0 mL = 0.251 L
Molarity of the sodium hydroxide = 0.600 M

Mass of 0.1506 moles of NaOH :

There are 6.024 grams of sodium hydroxide in the solution.