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3 years ago

3. 2 HCl (aq)

Chemistry

1 answer:

tekilochka [14]3 years ago

6 0

Explanation:

balance the equation ...HCl,Ba(OH) and BaCl2 are aqueous

know groups of the elements H 1+ ,Cl -,Ba 2+,OH-

write complete ionic eqution and eliminate spectator ions those appearing on both sides Cl and Ba

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Phase changes lab, please! I need help fast deadline is really close.

Lapatulllka [165]

Phase change occur in substances when the they change from one state of matter to another due to the addition or removal of heat.

<h3>What are phase changes?</h3>

Phase changes refers to the changes that occur in substances in which they change from one state of matter to another due to the addition or removal of heat.

The phase changes that occur in substances are as follows:

change from solid to liquid known as melting
change from liquid to gas known as vaporization
change from solid to gas known as sublimation
change from gas to solid known as deposition
change from gas to liquid known as condensation
change from liquid to solid known as freezing

Therefore, phase change occur in substances when the they change from one state of matter to another due to the addition or removal of heat.

Learn more about phase change at: brainly.com/question/13067020

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2 years ago

When atomic orbitals of two nuclei overlap, the mutual attraction between a negatively charged electron pair and the two positiv

Lera25 [3.4K]

Answer: Option (A) is the correct answer.

Explanation:

It is known that when sharing of electrons take place between two combining atoms then the bond formed is known as a covalent bond. In general, a covalent bond is formed between two non-metal atoms.

For example, the compound HCl has a covalent bond between the hydrogen and chlorine atom. As hydrogen atom has 1 valence electron and chlorine atom has 7 valence electrons.

So, in order to attain stability both these atoms will share their valence electrons and hence, a covalent bond is formed.

On the other hand, when an electron is transferred from one atom to another then it tends to form an ionic bond.

For example, the compound NaCl has an ionic bond.

Thus, we can conclude that when atomic orbitals of two nuclei overlap, the mutual attraction between a negatively charged electron pair and the two positively charged nuclei forms a covalent bond.

6 0

3 years ago

I'm not sure what the answer is

Talja [164]

Answer:

I think is A

Explanation: i'm not sure if im right.

4 0

2 years ago

Each of the jars was heated 90°C each jar was placed on the counter and allowed to cool

jeka94

Where is the rest of the question?

8 0

3 years ago

Write the formula of the conjugate acid of HCO₂⁻.

Alex

Taking into account the Brønsted-Lowry acid-base theory, the conjugate acid of HCO₂⁻ is H₂CO₂.

<h3>Brønsted-Lowry acid-base </h3>

The Brønsted-Lowry acid-base theory (or the Brønsted-Lowry theory) identifies acids and bases based on whether the species accepts or donates protons or H⁺.

According to this theory, acids are proton donors while bases are proton acceptors. That is, an acid is a species that donates an H⁺ proton while a base is a chemical species that accepts an H⁺ proton from the acid.

So, reactions between acids and bases are H⁺ proton transfer reactions.

<h3>Conjugate base and conjugate acid</h3>

Then, a conjugate base is an ion or molecule resulting from the acid that loses the proton, while a conjugate acid is an ion or molecule resulting from the base that gains the proton:

acid + base ⇄ conjugate base + conjugate acid

<h3>Conjugate acid of HCO₂⁻</h3>

Like a conjugate acid is an ion or molecule resulting from the base that gains the proton, the conjugate acid of HCO₂⁻ is H₂CO₂.

Learn more about the Brønsted-Lowry acid-base theory:

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7 0

2 years ago