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Andru [333]
2 years ago
15

Which statement is true about energy transfer?

Chemistry
1 answer:
Pavel [41]2 years ago
6 0

Answer:

B

explanation: I think

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Yes, because it wil grow and become a bigger seed or object
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3 years ago
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Determine the poh of a 0. 188 m nh3 solution at 25°c. the kb of nh3 is 1. 76 × 10-5.
S_A_V [24]

The pOH of the ammonia (NH₃) solution is 2.74.

Calculation:

We will start by composing a balanced ionization of NH₃ in aqueous.

NH₃(aq) + H₂O (l) → NH₄⁺(aq) + OH⁻(aq)

We'll also measure each compound's concentration at the end of the process.

NH₃ will partially dissociate. The quantity of NH3's dissociates can be disregarded. The concentration of NH₃ there at the final reaction is then nearly identical to that at the beginning reaction. NH₃ has a final concentration of 0.188 M.

NH₃≈ 0.188 M

As NH₄⁺ and OH ⁻ have the same ratio, then

[NH₄⁺]= [OH ⁻]

To determine the expression for the concentration of [OH] ions, we shall organize the accordance with the applicable (base constant) for the process into a written form.

Kb = ([NH₄][OH⁻]) / [NH₃]

Hence, the concentration of [NH₄⁺] can be written in the form of [OH⁻].

Kb = ([OH-] [OH⁻]) / [NH₃]

Kb = [OH⁻]² / [NH₃]

[OH⁻]² = Kb *[NH₃]

[OH⁻] = √(Kb *[NH₃])

Next, to find out the OH⁻ concentration we have to express the concentration as a form of the Kb equation :

[OH⁻] = √(1.76 * 10⁻⁵ * 0.188)

[OH⁻] = √3.31 * 10⁻⁶

[OH⁻] = √1.82 * 10⁻³

Hence,

pOH = -log[OH⁻]

pOH = - log1.82 * 10⁻³

pOH = 3 - log1.82

pOH = 2.74

So, the pOH of the NH₃ solution is 2.74.

Learn more about NH₃ here:

brainly.com/question/17021611

#SPJ4

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1 year ago
What atomic nucleus has the fewest protons
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Hydrogen-

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3 0
3 years ago
Magnesium carbonate decomposition on heating to form magnesium oxide and carbon dioxide. how many grams of magnesium oxide will
KIM [24]
This is how you would do it. set up the rxn. balance, in this case you didn't need to. make a grid and cancel out units.

3 0
3 years ago
Which is an effect of the ozone depletion over Antarctica?
Crank

Answer:

Probably D (extensive DNA damage in the eggs...), maybe E (all of the above)

Explanation:

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