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Bezzdna [24]
3 years ago
8

What particle has a negative electrical charge and is found in clouds

Chemistry
2 answers:
Pachacha [2.7K]3 years ago
4 0

electrons

Revolving around the nucleus at a distance is a cloud of particles called electrons. Each electron has a negative charge.

kobusy [5.1K]3 years ago
4 0

Answer:

Electron

Explanation:

Because electrons are negatively charge particles

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C is your answer. Because if you add two of them together you get a compound.
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A student bought a 1.55-ounce chocolate bar and left it in a car on a hot day.
mafiozo [28]

Answer:

A. Exactly 1.55 ounces

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Each of the following phrases matches one of the models below. Match the statement with its appropriate model.
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Not sure about any others but I believe 3 goes with B
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Just enough 0.500 M HCl is added to 30.0 mL of 2.5 M NH3 to reach the equivalence point. The Kb of NH3 = 1.8 X 10-5
algol13

a.NH₃+HCl⇒NH₄Cl

b.volume HCl=150 ml

c. pH=4.82

<h3>Further explanation</h3>

Reaction

NH₃+HCl⇒NH₄Cl

The equivalence point⇒mol NH₃=HCl

Titration formula :

M₁V₁n₁=M₂V₂n₂(n=acid base valence, NH₃=HCl=1)

mol NH₃

\tt 2.5\times 30=75~mlmol

mol HCl=75 mlmol

  • Volume HCl :

\tt \dfrac{75}{0.5}=150~ml

Volume total :

\tt 150+30=180~ml

  • molarity of salt(NH₄Cl)

mol NH₄Cl=mol NH₃=75 mlmol=0.075 mol

\tt M=\dfrac{0.075}{0.180}= 0.42

  • pH of solution

Dissociation of NH₄Cl at water to find [H₃O⁺]

\tt NH_4+H_2O\rightarrow NH_3+H_3O^+

ICE at equilibrium :

0.41-x            x        x

Ka(Kw:Kb)= 10⁻¹⁴ : 1.8.10⁻⁵=5.6.10⁻¹⁰

\tt Ka=\dfrac{NH_3.H_3O}{NH_4}=\dfrac{x^2}{0.41}

[H₃O⁺]=x :

\tt \sqrt{5.6.10^{-10}\times 0.41}=1.515.10^{-5}

pH=-log[H₃O⁺]

\tt pH=5-log~1.515=4.82

7 0
3 years ago
Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force.
NemiM [27]

Answer:

B

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and that the highly electronegative atom has lone pair outermost shell electrons.

In the 5 options, only B (CH3OH) has an N, O, or F atom that has lone pair outermost shell electrons (2 lone pairs on each O atom), so it can form hydrogen bonds within its molecules.

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