Answer: Option (B) is the correct answer.
Explanation:
A change which brings change in composition of atoms of a substance to result in the formation of new substances is known as a chemical change.
Therefore, in a chemical change new substances are formed which have different properties as compared to their reactants.
For example,
Thus, we can conclude that during all chemical changes atoms rearrange to form new substances.
The dissociation constant of the base : 7.4 x 10⁻⁴
<h3>Further explanation</h3>Butylamine, C4H9NH2 Is A Weak Base
Kb is the dissociation constant of the base.
LOH (aq) ---> L⁺ (aq) + OH⁻ (aq)
[OH⁻] for weak base can be formulated :
pH of solution : 12
pH+pOH=14, so pOH :
14-12 = 2, then :
the the dissociation constant (Kb) =
Or you can use from ICE method :
C4H9NH2(aq) + H2O(l) ⇌ C4H9NH3+(aq) + OH-(aq)
0.15
x x x
0.15-x x x