which ions remain in solution, unreacted, after each of the following pairs of solutions is mixed?

Answer:

2.358

Explanation:

Answer: 2.538

Explanation: You have to round the fourth figure from the left, you eliminate the one

The forces of attraction that exists between positive metal ions and their surrounding valence electrons is called: metallic bonds.

A chemical bond can be defined as the forces of attraction that exists between ions, crystals, atoms or molecules and they are mainly responsible for the formation of all chemical compounds.

In Chemistry, there are different types of chemical bonds and these are:

A metallic bond can be defined as the forces of attraction that exists between positive metal ions and their surrounding valence electrons.

This ultimately implies that, metallic bond are peculiar to positively charged metals but not negatively charged metals or non-metals.

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Answer:

Pedal, Pushing, and also launching it off a cliff with a catapult

Explanation:

I know nothing

Answer:

What??

Explanation:

I really do want to answer you but i dont understand your letters

waht is that??????

Answer:

A physical change is when the form of an object changes, but the substance stays the same.

Example: Ice melting into water.

Answer:

B 6NO  A 5N2  C 6H2O  D 4Nhd

Explanation:

The answers include the following:

Tendons are connective fibrous tissues that attaches muscle to bone and they have a bright white color together with a strong and smooth appearance which can be observed when studied.

Tendons are very important as they help in ensuring that the movement of parts of the body are easy due to its holding some structures such as ligaments in place. It is present in all bone joints due to its numerous functions in the musculoskeletal system of organisms.

The tendon is very flexible and binds the muscles in the body to other structures which is why it is referred to as a connective tissue and the above answers are the most appropriate.

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Stereoisomerism and structural isomerism are the two basic types of isomerism (spatial isomerism). Structural isomers are isomers that differ in structure or kind of bond and have the same number of atoms of each kind but differ in how those atoms are connected to one another. Isomer types often fall into two categories.

Constitutional isomerism are molecules with varying connections, similar to how red and green beads are arranged differently in simple bracelets. Stereoisomers are the second category. Stereoisomers have identical connectivity, but their component pieces are arranged differently in space.

The two primary types of isomerism are stereoisomerism, also known as spatial isomerism, and structural isomerism.

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Answer:

SiO2

Explanation:

4 2

Si \ / O

/ \

=>Si2O4

Cancelling 2 and 4

=>SiO2

Answer:

SiO2

Explanation:

You're welcome

If you draw the table of the Hess law, you can use that table to obtain the enthalpy of reaction

A table called the "Hess's law table" can be created to depict how Hess's law is used. The reactants, intermediates, products, and related enthalpy changes (H) of each reaction that takes place during a chemical reaction are listed in the table.

Hess's law indicates that you can add the enthalpy changes of the separate reactions to get the total reaction's enthalpy change (H). By eliminating common species between neighboring reactions in the table, the overall reaction is achieved.

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Although the valence electron structures of the atoms of each element in a vertical column are often the same, the number of energy levels in the atoms increases as the elements descend the column.

Because of their comparable chemical behavior, the vertical columns of the periodic table are referred to as groups or families. A family of elements' members share the same valence electron count and chemically similar characteristics.

Periods and groups are the names of the horizontal rows and vertical columns, respectively. Chemical characteristics of elements within the same group are comparable. Due to the fact that they have an equal number of outside

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Answer:

Frequency

Explanation:

When we talk about crests, we are referring to the high points of a wave.

We measure wave frequency by counting out the the number of crests (or high points) of a given wave that pass by a given point in a set amount of time. Thus, the higher the number of crests, the greater the frequency of the wave and vice versa.

We define the frequency of a wave as the number of waves that passes by a fixed point within a given period of time.

compound molecules that is it

Answer: Malleability

Explanation: is a physical property of metals that defines their ability to be hammered, pressed, or rolled into thin sheets without breaking. In other words, it is the property of a metal to deform under compression and take on a new shape.

1) Write the formula

2) The subscripts show us the number of each atom in the formula. In this case, we also have to make sure to count the parenthesis subscript.

There are

3 Cu

2 P

8 O

Answer:

salt and oil

water and salt

water and sugar

Explanation:

They form a new compound with new properties from the original element.

The same components are always present in the same ratios in a compound. Compounds' characteristics differ, sometimes significantly, from the characteristics of the constituent . This is due to the fact that when elements in such a compound combine, a whole new substance with distinct features results.

A compound contains special characteristics that set it apart from the characteristics of its basic elements.

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The chemical reaction between magnesium hydroxide (\(Mg(OH)_2\)) and hydrochloric acid (HCl) is a neutralization reaction.

This is because the acidic HCl and the basic \(Mg(OH)_2\) react to form a salt, magnesium chloride (\(MgCl_2\)), and water (\(H_2O\)). Neutralization reactions involve the combination of an acid and a base to form a salt and water, and the resulting solution has a neutral pH. In this case, the magnesium hydroxide acts as a base and reacts with the hydrochloric acid, which is an acid, to produce a neutral solution. The use of magnesium hydroxide or other antacids can help neutralize excess stomach acid and alleviate symptoms of heartburn and indigestion.

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The complete question is:

Excess stomach acid is often treated with milk of magnesia Mg(OH)2 or a similar substance. The chemical reaction that takes place in your stomach, in this case, would be:

\(Mg(OH)_2\) + \(2HCl\)→\(MgCl_2\) + \(2HOH\)

The equation represents a ____________ reaction.

A) decomposition

B) neutralization

C) redox

D) synthesis

The statement that best describes how electrons fill orbitals in the periodic table is: "Electrons fill orbitals in order of increasing energy from bottom to top in each group option(D)". This principle is known as the Aufbau principle.

The periodic table is organized based on the electron configuration of atoms. Each atom has a specific number of electrons, and these electrons occupy different energy levels and orbitals within those levels. The Aufbau principle states that electrons fill the orbitals in order of increasing energy.

Within each group (vertical column) of the periodic table, elements have the same outermost electron configuration, which determines their chemical properties. As you move down a group, the principal energy level increases, resulting in higher energy orbitals being filled.

When moving across a period (horizontal row), the orbitals being filled have the same principal energy level, but the effective nuclear charge increases. This results in an increase in the electron's energy as you move from left to right across the periodic table.

In summary, electrons fill orbitals in order of increasing energy from bottom to top in each group, and from left to right across periods in the periodic table.

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Answer:

5 moles

Explanation:

Given data:

Number of moles of HCl = 5 mol

Number of moles of H₂O produced = ?

Solution:

Chemical equation:

HCl + NaOH     →   NaCl + H₂O

Now we will compare the moles of HCl with H₂O.

                          HCl            :           H₂O

                             1               :             1

                             5               :            5

5 moles of water will be produced.

Answer:

The difference between them is that instead of sticks representing bonds, as in the ball and stick model, the spheres that represent atoms are fused together and the size of the sphere represents the size of the actual atom.

Explanation:

Answer:

I think the first one (not really sure) but just try hehe

A substance's hue varies over time: Chemical transformation (Over time, the material is changing into a different chemical.

How can you tell whether a change you witness is chemical or physical?

In a physical change, the substance's shape or appearance changes, but the type of matter it contains stays the same. In contrast, when matter undergoes a chemical transformation, at least one new substance with novel features is created.

Not every change in colour results from a chemical shift. If one were to alter a substance's colour through a non-chemical interaction, such as painting an automobile, the alteration would be physical rather than chemical. This is due to the fact that the car's makeup has not changed.

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The resulting pH after adding the HNO\(_{3}\) solution is around the same as the pKa of HF, which is 3.17. Option D is the answer.

To determine the resulting pH after adding 15 mL of a 0.1 M HNO\(_{3}\) solution to 200.0 mL of a buffer made of 0.25 M HF and 0.25 M NaF, we need to consider the buffer's capacity to resist changes in pH.

The buffer consists of a weak acid (HF) and its conjugate base (F-). When an acid (HNO\(_{3}\)) is added, it reacts with the base (F-) in the buffer to form the conjugate acid (HF) and the nitrate ion (NO\(_{3}\)-).

Since the initial concentrations of HF and F- are equal (0.25 M), the buffer is at its optimal pH, which is approximately equal to the pKa of HF (3.17).

Adding the HNO\(_{3}\) solution increases the concentration of the conjugate acid (HF) and decreases the concentration of the base (F-). However, since the concentrations of HF and F- are still equal, the pH remains close to the pKa.

Therefore, the resulting pH after adding the HNO\(_{3}\) solution is approximately equal to the pKa of HF, which is 3.17.

Option D, 3.17, is the answer.

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Answer:

A. The sun is stationary and we rotate around it.

Hope This Helps!

Answer:

A

Explanation:

the sun is stationary

Answer:

b,c,d

Explanation:

bc i got it right

The apparatus that could be used to detect that a chemical change occurred with a substance in a laboratory setting are as follows:

Thus, the correct options for this question are B and C.

A chemical change may be defined as an alteration in the properties of one material into another. New materials or substances are formed with different properties along with appearance. It results when a substance combines with another to form a new substance.

An odor test and detecting the liberation of gas in the experiment are some of the best ways to reveal whether a chemical change may occur during the reaction or not, while the rest of the options are not as much as practical.

Therefore, the correct options for this question are B and C.

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The ions present in a solution of Na₂CO₃ are: Na⁺ and CO₃²⁻

Ions are electrically charged particles formed when an atom gains or loses electrons. Atoms that lose electrons become positively charged ions called cations, while atoms that gain electrons become negatively charged ions called anions.

Ions play a crucial role in chemical reactions and the formation of compounds. They can combine together to form ionic compounds through the attraction between opposite charges. In solution, ions are responsible for conducting electricity and participating in various chemical reactions.

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A hammer strikes a compound formed by covalent bonds, It will break into many pieces. Therefore, option A is correct.

An electron exchange that results in the formation of electron pairs between atoms is known as a covalent bond. Bonding pairs or sharing pairs are the names given to these electron pairs. Covalent bonding is the stable equilibrium of the attractive and repulsive forces between atoms when they share electrons.

Atoms join together in a covalent bond by exchanging electrons. Nonmetals typically form covalent connections with one another. For instance, each hydrogen (H) and oxygen (O) atom in water (H2O) shares a pair of electrons to form the molecule of two single-bonded hydrogen atoms and one single-bonded oxygen atom.

Thus, option A is correct.

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Answer:

States of Matter

Solid has fixed volume.

Solid has fixed shape.

Solid has high density.

Solids are heavy.

Solid does not flow.