bases contribute _____ to a solution

The answer is at attachment. There are:

Covalent bond is a type of chemical bond that involves the sharing of electrons between atoms. There are two types:

Hydrogen bonds occur between different molecules and involve the partial electrostatic attraction between a hydrogen atom and an electronegative atom (such as oxygen [O] and chlorine [Cl]) in a different molecule. Covalent bonds occur between atoms in the same molecule or compound and involve the sharing of electrons to form a stable chemical bond.

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Answer:

False

Explanation:

Kinetic energy is energy due to motion a grain of sand can move easily as compared to cement block.

Morever cement block have potential energy or stored energy.

Answer:

whatttttttttttttr//ttttt

Answer:

the bus will stop here, wouldn't it?

The difference in properties between the reactants (calcium and chlorine) and the product (calcium chloride) can be explained by considering the bonding and structure of the substances involved.

Calcium is a metal, while chlorine is a nonmetal. In the reaction between calcium and chlorine gas, calcium donates two electrons to chlorine, resulting in the formation of calcium chloride (CaCl2). This process involves the formation of ionic bonds.

Calcium chloride has a different structure and bonding compared to its reactants. In the solid state, calcium chloride forms a crystal lattice structure composed of alternating calcium cations (Ca2+) and chloride anions (Cl-). This ionic bonding arrangement leads to strong electrostatic attractions between the oppositely charged ions.

The properties mentioned in Figure 9 can be explained based on this structure and bonding:

Ability to Conduct Electricity: Calcium chloride, when dissolved in water or in its molten state, can conduct electricity. This is because the ions in calcium chloride are free to move and carry electric charge, facilitating the flow of electricity. In contrast, solid calcium and chlorine do not conduct electricity well as they do not have freely mobile charged particles.

Relative Melting Point: Calcium chloride has a high melting point compared to chlorine. This is due to the strong ionic bonds between calcium and chloride ions in the crystal lattice, requiring significant energy to break those bonds and transition from a solid to a liquid state. Chlorine, being a nonmetal, has weaker intermolecular forces, resulting in a lower melting point.

Based on the differences in bonding and structure, the properties of the product (calcium chloride) differ from those of the reactants (calcium and chlorine), particularly in terms of electrical conductivity and melting point.

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Answer:

Galileo: "Father of Modern Science."

Aristotle: Geocentric theory." (The planests revolves around the earth.)

Torricelli: Invented the barometer. (An instrument which measures pressure.)

Copernicus: Heliocentric theory. (Aka, the planets revolves around the sun.)

Vesalius: Examined the inner workings of the human body

Newton: Developed law of universal gravitation.

Nightingale: Founded nursing profession.

Celsius: Developed metric temperature scale

I hope this helps! Thanks:)

Answer:

i) 24.305 u

iv) The number of protons determines an element's atomic number and is used to distinguish one element from another.

Answer:

1) 24

2)protons

Explanation:

1) magnesium Ar

2) atomic number

This is not the best way to organize a periodic table because two elements might have similar atomic mass.

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

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Answer:

Look in explanation:

Explanation:

Chalk is composed of Ca(CO3).

This will not dissolve in H2O because the ionic bonds between the calcium and carbonate are too powerful to be disrupted by water so it will have no effect.

No reaction takes place when sand is mixed with water and the sand would just sink down.

Answer: A sodium atom has one electron in its outer shell. The atom is more stable if it has a full outer shell. A sodium atom can lose its outer electron. It will still have 11 positive protons but only 10 negative electrons.

Explanation:

Answer:

Valence electrons the outermost electrons, and are the ones involved in bonding. Sodium has 11 electrons: its atomic number is 11, so it has 11 protons; atoms are neutral, so this means sodium also has 11 electrons.

Explanation:

Hope it helps.

Noble gases in Group VIII have electron affinities that are close to zero because each atom has a stable octet and does not readily accept an electron.

Both electron affinity and electron negativity have a downward trend over time. The electron affinity is also 0 if the electron negativity is 0. Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson are the elements with no affinity for electrons (Og). Affinities for electrons can be zero, negative, or positive. Noble gases in Group VIII have electron affinities that are close to zero because each atom has a stable octet and does not readily accept an electron. There is no tendency for noble or inert gases to gain an electron. Its electron affinity is therefore zero.

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A solution of iodine changes from brown to blue when starch is added to it. You are observing the disappearance of reactants over time. Therefore, the correct option is option B.

A homogenous mixture of more than one component is referred to as a solution. On a particle-by-particle basis, it is homogeneous. Most of the time, people picture it as a liquid that has dissolved solids, liquids, or gases in it. This is not totally accurate, though. Alloys are a good alternative that we may use.

Solute is the name for the part of a solution that dissolves in the solvent. The solute constitutes the solution's tinier component. For instance, iodine represents the solute in "tincture of iodine," an alcohol-based solution of iodine. A solution of iodine changes from brown to blue when starch is added to it. You are observing the disappearance of reactants over time.

Therefore, the correct option is option B.

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The process of moving water through a plant by transpiration works because water molecules stick to one another with hydrogen bonds. This allows water to be gotten up through the plant's xylem from the roots to the leaves.

In chemistry, a hydrogen bond is a electrostatic power of attraction between a hydrogen (H) atom which is covalently bound to a more electronegative "benefactor" atom or gathering (Dn), and another electronegative atom bearing a solitary sets of electrons — the hydrogen bond acceptor (Ac)1. Hydrogen bonds can exist between atoms in various molecules or in parts of the same particle.

Hydrogen bonding is a special sort of dipole collaboration that occurs between the solitary sets of an exceptionally electronegative atom (commonly N, O, or F) and the hydrogen atom in a N-H, O-H, or F-H bond.

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Answer:

A. Budding?

Explanation:

Hope the answer helps you :)

Answer:

B: Binary fission

Explanation:

Answer:

C

Explanation:

No, Yvonne cannot classify this mixture as a true solution because a true solution is a homogenous mixture where the solute is completely dissolved in the solvent, resulting in a clear solution.

In this case, the solid did not dissolve and the mixture is cloudy, indicating that the solid particles are still present in the mixture. This mixture is known as a suspension, which is a type of heterogenous mixture where the solid particles are not dissolved but are instead suspended in the solvent. Therefore, Yvonne's mixture cannot be considered a true solution because it does not meet the criteria for a homogenous mixture where the solute is completely dissolved in the solvent.
Yvonne cannot classify the mixture as a true solution. A true solution is a homogeneous mixture with a uniform composition throughout. In this case, the solid does not dissolve in water, resulting in a cloudy appearance. This indicates that the mixture is not homogeneous, and it is instead a suspension. Suspensions consist of solid particles dispersed in a liquid, and the particles are large enough to settle or be filtered out. Since the mixture is not uniform and the solid particles do not dissolve, it cannot be considered a true solution.

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Answer:

There is ionic bonding between Mg2+ ions and NO3− ions. Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid? Both elements in the compound are metals.

Answer:

The answer is D.

Explanation:

A: not correct: one element is a metal and the other is a non-metal.

B: not correct: Fr could be combined with Cl

C: not correct: They are transferred not shared.

D: correct: Non-metals have a higher electronegativity in comparison to the metals with a low electronegativity which results in a great change in electronegativity.

Answer:

6.31g/mol

Explanation:

Using the ideal gas equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

Mole (n) = mass (m)/molar mass (Mm)

* Mm = m/n

Also, density (p) = mass (m) ÷ volume (V)

PV = nRT

Since n = M/Mm

PV = M/Mm. RT

PV × Mm = m × RT

Divide both sides by V

P × Mm = m/V × RT

Since p = m/V

P × Mm = p × RT

Mm = p × RT/P

Mm = 0.249 × 0.0821 × 293/0.95

Mm = 5.989 ÷ 0.95

Mm = 6.31g/mol

Answer:

A

Explanation:

The overall  balanced reaction when an aqueous solution of srcl2 reacts with an aqueous solution of na3po4  is given by ,

SrCl2 + Na3PO4 = Sr3(PO4)2 + NaCl

With the chemical formula SrCl2, strontium chloride is a common salt of strontium and chlorine.

A common halide used to create collodion chloride and print emulsions is strontium chloride.

Based on a frequently misinterpreted study employing radiolabeled strontium and auto-radiography, strontium chloride is the first chemical in toothpaste thought to occlude tubules.

The toxicity of strontium compounds is lower.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides.

In a balanced chemical equation, the mass and the change are both equal.

A chemical equation must balance according to the rule of conservation of mass.

According to the rule, mass cannot be generated or removed during a chemical process. Chemical equations must therefore be correctly balanced.

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Answer:

This is just a quick tip.

Explanation:

An electric current is the movement of particles, starting at the moment when an external voltage is applied at one of the ends of the conductor. That, in turn, generates an electric field on the negatively charged electrons that are attracted to the positive terminal of the external voltage.

The net ionic reaction that occurs upon the addition of HNO₃ to a solution which contains methylamine (CH₃NH₂) and methylammonium chloride (CH₃NH₃Cl) is:

CH₃NH₂+ HNO₃ → CH₃NH₃+ + NO₂₋


When HNO₃ is added to the solution, it reacts with the methylamine to form methylammonium ion (CH₃NH₊) and nitrous oxide (NO₂₋) as the products. This is an acid-base reaction in which HNO₃ acts as an acid and donates a proton (H+) to the lone pair of electrons on the nitrogen atom of methylamine, which acts as a base. The resulting methylammonium ion (CH₃NH₃₊) is positively charged and forms an ionic bond with the negatively charged chloride ion (Cl-) to form methylammonium chloride (CH₃NH₃Cl), which remains in solution.

The net ionic reaction only shows the species that are directly involved in the reaction, and excludes the spectator ions (Cl- and H+) which do not participate in the reaction.

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Upon addition of HNO3 to the solution containing methylamine and methylammonium chloride, a neutralization reaction occurs between H+ ions of HNO3 and the base (CH3NH2) resulting in the formation of CH3NH3+. The net ionic reaction is CH3NH2 + H+ → CH3NH3+.


When HNO3 is added to the solution containing methylamine (CH3NH2) and methylammonium chloride (CH3NH3Cl), a neutralization reaction occurs between the H+ ions of HNO3 and the base (CH3NH2) resulting in the formation of CH3NH3+.
The reaction can be represented as follows:
CH3NH2 + HNO3 → CH3NH3+ + NO3-
However, since methylammonium chloride (CH3NH3Cl) is a salt and dissociates into ions in the solution, we need to write the net ionic reaction.
The net ionic reaction is:
CH3NH2 + H+ → CH3NH3+
This shows that only the CH3NH2 molecule and H+ ion are involved in the reaction to form CH3NH3+.

Summary:
Upon addition of HNO3 to the solution containing methylamine and methylammonium chloride, a neutralization reaction occurs between H+ ions of HNO3 and the base (CH3NH2) resulting in the formation of CH3NH3+. The net ionic reaction is CH3NH2 + H+ → CH3NH3+.

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Answer:

2,649,024,000

Explanation:

Multiply 72*60*24*365*70

Answer:

8

Explanation:

Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus

Answer:

Explanation:

The speed of the rocket can be found by using the formula

\(v = \frac{d}{t} \\ \)

where

d is the distance

t is the time

From the question we have

\(v = \frac{1400}{11} \\ = 127.272727...\)

We have the final answer as

Hope this helps you

Answer:

The slope is -1/2 or -0.5.

Cell division resulting in two new nuclei having the same number of chromosomes as the

original nucleus is called mitosis

The curved arrow shows the movement of the proton from the acid catalyst to the alcohol, followed by the movement of the electrons from the alcohol to the carbocation formed from the alkene.

In more detail, the acid-catalyzed addition of alcohols to alkenes involves the protonation of the alkene by the acid catalyst, which generates a carbocation intermediate. The alcohol then acts as a nucleophile and attacks the carbocation, leading to the formation of an oxonium ion. In the final step, the oxonium ion is deprotonated by a water molecule or another molecule of alcohol, yielding the ether product. The curved arrows in this mechanism show the flow of electrons as the proton is transferred from the acid to the alcohol and as the electrons move from the alcohol to the carbocation intermediate.

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