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Step-by-step explanation:

We know by Triangle Angle Sum theorem that all angles must add up to 180˚. With this, we can make a simple a equation that models the Triangle Angle Sum theorem.

∠ H + ∠G + ∠F = 180˚

Now we can just substitue their corresponding values to make a solvable equation.

Rearrange the numbers so that similar values are together.

Simplify

Subtract 20 on both sides of the equation.

Divide both sides of the equation by 5.

ff

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.

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.