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Tems11 [23]
2 years ago
12

What does the electronegativity of an atom indicate?

Chemistry
2 answers:
mezya [45]2 years ago
8 0
What does the electronegativity of an atom indicate?

D. The energy required to gain or lose an electron.
svp [43]2 years ago
4 0

Answer:

A. The tendency of the atom to pull on electrons

Explanation:

Took the quiz for  A⃣   p⃣   e⃣   x⃣  , its A

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Answer: 6.02 × 10^24

Explanation:

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2 years ago
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25.0 mL of a hydrofluoric acid solution of unknown concentration is titrated with 0.200 M NaOH. After 20.0 mL of the base soluti
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Answer:

[HF]₀ = 0.125M

Explanation:

NaOH + HF => NaF + H₂O

Adding 20ml of 0.200M NaOH into 25ml of HF solution neutralizes 0.004 mole of HF leaving 0.004 mole NaF in 0.045L with 0.001M H⁺ at pH = 3.   This is 0.089M NaF and 0.001M HF remaining.

=> 45ml of solution with pH = 3 and contains 0.089M NaF from titration becomes a common ion problem.

                HF  ⇄    H⁺    +      F⁻

C(eq)       [HF]     10⁻³M      0.089M (<= soln after adding 20ml 0.200M NaOH)

Ka = [H⁺][F⁻]/[HF]₀ => [HF]₀ = [H⁺][F⁻]/Ka

[HF]₀ = (0.001)(0.089)/(7.1 x 10⁻⁴) M = 0.125M

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3 years ago
7. Buffalo were moved from Yellowstone National Park because
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