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Anna71 [15]
3 years ago
10

What are the extremely small particles that all elements are composed of?

Chemistry
2 answers:
muminat3 years ago
7 0
Atoms is the correct answer
Romashka-Z-Leto [24]3 years ago
7 0
Atoms is the correct answer
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Aqueous sodium hydroxide forms a light blue precipitate. What is the formula of the blue precipitate?
lisabon 2012 [21]

Answer:

Cu2+(aq) + 2OH-(aq) => Cu(OH)2(s)

Explanation:

Use of aqueous sodium hydroxide is a precipitation reaction to test for anions or cations. Aqueous sodium hydroxide in a precipitate test forms a insoluble precipitates along with some colors characteristics.

Aqueous sodium hydroxide (NaOH) when mixed with copper(II) (Cu2+) forms a blue precipitate. The formula is as follows:

Cu2+(aq) + 2OH-(aq) => Cu(OH)2(s)

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 Lets find the electronegativity difference between the bonded atoms;

C-H = 2.6-2.2 = 0.4

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Here the electronegativity difference is highest for C-F bond hence C-F bond is most polar.

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