Answer:
pOH=9.9
Explanation:
pH=-log[H+]= -log[0.0000877]
=4.06
pOH+ pH=14
pOH=14-4.06= 9.91
Answer:A and B
Explanation:
A substance is said to be polar when it is having a dipole (a delocalised positive and negative charge) or it is ionic (dissociate into ions when dissolved in water)
A. All the changes to a system cancel out.
Explanation:
In a dynamic equilibrium, it looks as if nothing is happening for reversible reactions because the changes simply cancels out.
This will then appear like no change is happening in it. When external stress is introduced into the system, it will annul its effect in order to remain in equilibrium.
- The system must be involved in reversible chemical processes no matter how small the extent of the reversibility.
- The rate of forward process is equal to the rate of the backward process.
- The system is closed and cannot exchange energy.
- The free energy change of the system is zero.
- There is no change in concentration of each species in equilibrium.
- The system offers resistance to any change in factors.
learn more:
Equilibrium brainly.com/question/10838453
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im sorry im just as vonfused as you are. but i think i can help a lil. it says to subtract the number on the from the number on the bottome and then divide them both.
