CHEMISTRY HIGH SCHOOL

The reaction AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) is a_________reaction. please help

Answers

Answer 1
Answer:

Answer:

it's a precipitation reaction.

Explanation:

the solid produced is insoluble with water–making it a precipitate.

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Sodiun atom, potassium atom, and cesium atoms have the same ?

Answers

Answer:

They have similar chemical properties

Explanation:

Hi, those elements all belong to the Group I of the periodic table meaning that they share not only similar electronic configuration (1 electron of valence) but also they have similar chemical properties, being those more marked the higher the atomic number.

  • An example of that shared properties is that all of them react violently with water, being cesium the most violent.
sodium atom , potassium atom and cesium atom have the same group number which is group 1

Suggest one reason why hydrogen is called a "clean fuel"

Answers

Because there is no carbon, CO2 is not a product of its combustion, only water.

The range in size of most atomic radii is approximately _____.5 × 10−11 m to 2 × 10−10 m
2 to 5 nm
5 × 10−21 m to 2 × 10−20 m
2 to 5 cm

Answers

The atomic radii is approximately between 5 × 10−11 m to 2 × 10−10 m
The range in size of most atomic radii is approximately 5 × 10−21 m to 2 × 10−20 m. The rest of the choices do not answer the question above.

What is the pH of an aqueous 0.032 M pyridine, (C5H5N)? (Kb for pyridine = 1.7 x 10–9)

Answers

pH + H₂O ⇋ [pOH]⁺ + OH⁻
 
Kb = [pOH⁺][OH⁻] / [ pH] = 1.7×10⁻⁹

Let x mol dissociate:

 [pOH⁺] = [OH⁻] = x [pH] = 0.032 - x ≈ 0.032

[x] [x] / [0.032] = 1.7×10⁻⁹

x₂ = 0.032 * 1.7 x 10⁻⁹

x = 5.44 x 10⁻¹¹ = [OH⁻] 

pOH = -log [OH⁻] = -log[  5.44 x 10⁻¹¹] = 10.26

pH = 14.00 - pOH 

pH = 14.00 -  10.26

PH = 3.74

hope this helps!

Which subctant will not conduct electricity a Aluminium b copper c plastic d steel​

Answers

Answer:

plastic

Explanation:

plastic doesn't conduct electricity

The atomic weight of an unknown element, in atomic units (amu), is approximately 20% less than that of calcium, the atomic weight of calcium is 40 amu. Which of the following best approximates the atomic weight, in amu, of the unknown element? (a) 8 (b) 20 (c) 32 (d) 48

Answers

a) 8

40*20%

=40*20/100

=800/100

=8

Final answer:

The atomic weight of the unknown element, which is approximately 20% less than calcium (40 amu), is estimated to be 32 amu.

Explanation:

The atomic weight of an unknown element is said to be approximately 20% less than that of calcium, which has an atomic weight of 40 atomic mass units (amu). To calculate the approximate atomic weight of the unknown element, take 20% of 40 (which is 8) and subtract it from 40. The result is 32 amu (40 - 8 = 32), so the correct answer is (c) 32.

Learn more about Atomic Weight here:

brainly.com/question/36410206

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