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hjlf
3 years ago
7

What's the answer will mark brainliest​

Chemistry
2 answers:
Serga [27]3 years ago
4 0

Answer:

D. Mars

hope it helps...

NemiM [27]3 years ago
3 0

Answer:

D Mars is the correct answer

hope it is helpful to you

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How many electrons could have the following set of quantum numbers?.
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2

Explanation:

As only 2 electrons can present in an orbital, so only 2 electrons in an atom can have this set of quantum numbers.

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What will happen to convection currents in the mantle if earths interior eventually cools down?
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The people in a coastal location are packing emergency supplies and evacuating their homes. Which of these statements best expla
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Sonni added 23.79 mL of KOH to 20.00 mL of 0.393 M HF until the equivalence point was reached. What is the concentration of conj
madreJ [45]

Answer:

0.1795 M

Explanation:

From the given information:

The equation is:

\mathbf{HF_{(aq)}+ KOH_{(aq)} \to KF _{(aq)} + H_2O}

From the above equation, the reaction will go to completion due to the strong base:

At the equivalence point, moles of acid (HF) will be equal to moles of base (KOH)

\text{Number of moles = Volume}  \times Molarity

Thus. since moles of HF = moles of KOH

Then; 0.020 × 0.393 M = 0.02379 × (x) M

(x) M = \dfrac{0.02 \times 0.393 \ M}{0.02379}

(x) = 0.3304 M

Thus, the molarity of KOH = 0.3304 M

Using the balanced neutralization reaction;

moles of HF = moles of KOH = moles of conjugate base = 0.00786 mol

∴

Volume = 0.020 L + 0.02379 L

Volume = 0.04379 L

Volume of the solution =  0.04379 L

Therefore; Molarity = \dfrac{moles}{volume}

Molarity = \dfrac{0.00786  \ mol}{0.04379  \ L}

Molarity = 0.17949 mol/L

= 0.1795 M

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3 years ago
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