At noon, a tank contained 20 cm of water. After several hours, it contained 18 cm of water. What is the percent decrease of water in the tank?
The percent decrease of water in the tank is
%.​

Step-by-step explanation:

Percentage decrease = Difference/Original value

So,

Percentage decrease

So there fore the percentage decrease is 10%

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.

the correct answer to your question is a. 4^4

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