Noble gases have a blank balance she’ll with blank electrons. Because their balance she’ll is full they blank need to borrow or gain electrons

Moles of Ammonia (NH₃) in solution = 1.14

Given

0.175 L of 6.50 M aqueous ammonia

Required

moles of ammonia

Solution

Ammonia = NH₃

Molarity = moles of solute per liter of solution

\(\tt M=\dfrac{n}{V}\)

n = M x V

n = 6.50 M x 0.175 L

n = 1.1375 moles

In a multiplication operation: the significant digits in the final product must follow the number of significant digits that are at least in the numbers involved in multiplying

6.50 = 3 sig fig

0.175 = 3 sig fig

So the result must be 3 sig fig

1.1375 rounded to 1.14

Answer:

The sales clerk can count your nails in 6 groups of 500 nails, or 30 groups of 100 nails to ease the counting process and garauntee a more accurate result.

Explanation:

The pressure that would be needed is 5.06 atm.

Pressure is the force exerted perpendicular to any object.

The mass of disulfur monoxide gas is 175 g

Volume is 16,600 ml

Temperature is 195

Step 1: Calculating the moles

\(\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\\\rm Number\;of \;moles= \dfrac{175}{80 g/mol} = 2.1875\; moles\)

Step2 : calculating the pressure

By the formula of PV= NRT

V = 16600mL = 16600/1000 = 16.6L

Temp. = 195°C + 273 = 468K

r = gas constant os 0.082atm.L/Kmol

Putting the value in the equation

\(\rm P \times 16.6 = 2.1875 \times 0.082 \times 468\\\\P =\dfrac{ (2.1875 \times 0.082 \times 468) }{16.6} = 5.06 atm\)

Thus, the pressure is 5.06 atm.

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The concentration of hydroxide ion in the solution is approximately 2.2 × 10⁻⁵ M.

To determine the concentration of hydroxide ion in the aqueous solution of methylamine, we need to consider the equilibrium of the reaction between methylamine (CH₃NH₂) and water (H₂O), which produces methylammonium ion (CH₃NH₃⁺) and hydroxide ion (OH⁻).

The Kb value provided is 4.4 × 10⁻⁴.

The equilibrium expression for the reaction is as follows:

CH₃NH₂ + H₂O ⇌ CH₃NH₃⁺ + OH⁻

At equilibrium, the concentration of hydroxide ion can be expressed as [OH⁻] = Kb × [CH₃NH₂].

Given that the concentration of methylamine ([CH₃NH₂]) is 0.050 M, we can substitute this value into the equation to find the concentration of hydroxide ion:

[OH⁻] = (4.4 × 10⁻⁴) × (0.050)

[OH⁻] ≈ 2.2 × 10⁻⁵ M

Therefore, the concentration of hydroxide ion in the solution is approximately 2.2 × 10⁻⁵ M.

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Decane react with 31/2 O₂  to yield 10CO₂ and 11H₂O.

Reaction is given below:-

C₁₀H₂₂ + 31/2 O₂ → 10CO₂ + 11H₂O

Hence, Decane react with 31/2 O₂  to yield 10CO₂ and 11H₂O.

Molecular oxygen, O₂ is a diatomic molecule that is composed of two oxygen atoms held together by a covalent bond. Molecular oxygen is essential for life, as it is used for respiration by many organisms.

Diatomic means that an atom cannot exist by itself. There is no such thing as lone O atoms floating around the atmosphere. Oxygen exists as O₂ .

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Answer: North

Explanation:

Answer: I believe the 1st and 3rd reactions are better obtained through reference sources and the 2nd and 4th are easiest and safest to measure in the laboratory.

Explanation:

I am also working on this Pre-lab right now, and I looked back at the first question to help get my answer. In the first question (a), it is noted that ammonia gas and gaseous hydrochloric acid are both potentially dangerous in gaseous form. I saw that both the 1st and 3rd reactions contained noxious gases (I knew this because there was a (g) in both of these reactions). Using the knowledge from the first question that the noxious gases were potentially dangerous, I assumed that those reactions were the ones that are better obtained through the reference sources. The 2nd and 4th reactions did not contain any noxious gases, so I assumed those ones were easiest and safest to measure in the laboratory. Hope this helps!

Answer:

oh my god i have learnt about this

Explanation:

Answer:

Point A

Explanation:

I dont know why but it was right on the test.

Answer: B) ethanol

Explanation:

Due to its strong attraction with water molecules.

Answer:

four

Explanation:

adenine, thymine, guanine, and cytosine

Answer:

A reaction is "completed" when it has reached equilibrium — that is, when concentrations of the reactants and products are no longer changing. If the equilibrium constant is quite large, then the answer reduces to a simpler form: the reaction is completed when the concentration of a reactant falls to zero.

Explanation:

I hope it's help

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Answer:

Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.

Explanation:

brainliest?

Answer: Hope this helps:)

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. The law of conservation of matter states that in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant. The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants. French chemist A. Lavoisier laid the foundation to the scientific investigation of matter by describing that substances react by following certain laws. These laws are called the laws of chemical combination. Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another. Matter can change form through physical and chemical changes, but through any of these changes, the matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

The volume of air in the tire will be 400 ml.

When the first man pumps 200 ml of air into the tire, the initial volume increases from 300 cu cm (equivalent to 300 ml) to 500 ml. Then, when the second man pumps another 200 ml of air, the volume further increases by 200 ml, resulting in a total volume of 700 ml. Therefore, the correct option is 400 ml.

To understand the calculation, we add the volumes of air pumped by each person to find the total volume of air in the tire. The initial volume of the tire is 300 ml, and the first man pumps 200 ml, bringing the total to 500 ml. Then, the second man pumps another 200 ml, resulting in a final volume of 700 ml.

In this case, option (d) 400 ml is the correct answer since it represents the actual volume of air in the tire after both men have pumped air into it.

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The image of (-2,-2) after a dilation by a scale factor of 2 centered at the origin is -10,-10.

Dilation is defined as a method of altering an object's or shape's size by reducing or expanding its dimensions by certain scaling parameters.

It can also be defined as the state of being stretched or swollen beyond what is usual, especially as a result of illness, overwork, or abnormal relaxation, which can cause dilatation of the heart or dilatation of the stomach.

Simply multiply by 5 because the point is at the origin.

So, -2 x 5 = -10

and -2 x 5 = -10

Thus, the image of (-2,-2) after a dilation by a scale factor of 2 centered at the origin is -10,-10.

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A vital component of both chemical and biological processes, water is a wonderful substance. Its special characteristics result from the organisation of its molecules and the interactions they have with one another and with other molecules.

Water's ability to generate hydrogen bonds is one of its most significant characteristics. The negative oxygen atom of one water molecule interacts electrostatically with the positive hydrogen atom of another, forming hydrogen bonds. Water has a high surface tension as a result of these connections, which also enable it to form droplets and adhere to surfaces. For the structure and stability of biomolecules like proteins and nucleic acids in biological systems, hydrogen bonding are essential.The solvent water is likewise quite good. Many different polar and ionic chemicals can be dissolved by it because of its polar nature. The cytoplasm of cells and other biological fluids like blood contain it since it is a necessary component.

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A balanced chemical equation always obeys law of conservation of mass.

A  balanced chemical equation generally obeys to law of conservation of mass. As per this regulation the mass of items should be equivalent to the mass of reactants. A response is supposed to be adjusted when the complete mass of particles on the two sides of the substance response is equal.According to the law of conservation of mass, the mass of the items in a synthetic response should rise to the mass of the reactants.

The law of conservation of mass is helpful for various computations and can be utilized to tackle for obscure masses, such how much gas consumed or delivered during a reaction.They should submit to the Law of conservation of Mass that expresses that matter can't be made or obliterated, it is saved. The mass of the reactants should rise to the mass of the products.Thus, the mass of substances created in a synthetic response is consistently equivalent to the mass of responding substances. Consequently, you really want to have a similar number of each kind of component on each side of a synthetic condition. This is the entire reason for adjusting a synthetic condition.

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156

because it has the electorns in the state by the groubd

The name of the ionic compounds include:

2. BPo is Berry Polonium oxide

3. Bl₂Tu is Blueberry Tungsten dichloride

4. Cr₂Sn is Cranberry Tin oxide

5. LiSr₂ is Lime Strontium dichromate

6. Or₃Ba₂ is Orange Barium trioxide

Ionic compounds are chemical compounds formed by the electrostatic attraction between positively and negatively charged ions. They are composed of positively charged ions, called cations, and negatively charged ions, called anions. Ionic compounds are typically formed by the reaction of a metal with a nonmetal, or of a metal and a polyatomic ion.

In an ionic compound, the number of positive charges must equal the number of negative charges so that the compound has a neutral overall charge. Ionic compounds tend to have high melting and boiling points, as well as good electrical conductivity in their molten or dissolved states, but are typically brittle solids at room temperature.

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Answer:

The loss of crystalline structure of sucrose was reported at various temperatures, but decomposition, after >50 h of holding at 120 °C in a sealed pan.

Explanation:

As this condition is above the melting temperature of fructose (a possible first decomposition product), and there were water and impurities.

Answer:

B y is a complete collection for your time and energy for the spread of Islam in the Horn of the following to make sure

Ernest Rutherford's experiments in which alpha rays pass through a thin piece of metal foil demonstrated that atom contains a tiny nucleus containing most of the atom's mass. The correct answer choice is "the atom contains a tiny nucleus containing most of the atom's mass."

The alpha-particle scattering experiment was performed by Ernest Rutherford in 1911. It was conducted to discover the nature of atomic structure. The experiment demonstrated that most of the mass of an atom and all of its positive charge are contained in a small nucleus at the center of the atom.

The electrons were found to occupy almost all of the remaining space. Therefore, the correct answer is the atom contains a tiny nucleus containing most of the atom's mass.

Therefore "the atom contains a tiny nucleus containing most of the atom's mass." is the correct answer.

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A. The order of nucleotide bases within a gene determines the arrangement of amino acids in a protein. The genetic code, which is made up of the bases in DNA, dictates the order in which the amino acids will be combined to form proteins.

The DNA nucleotide base sequence is translated into a complementary sequence of bases in mRNA during the protein production process. Then, using the mRNA as a template, a protein chain is put together, with each triplet of bases (known as a codon) designating a certain amino acid. The ribosomes, which are in charge of protein synthesis, assemble the amino acids in the order dictated by the mRNA rather than choosing the amino acid sequence of a protein. Although necessary for protein synthesis, the availability of amino acids in the cell cytoplasm does not affect the precise amino acid sequence of a protein.

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Answer:

What happens if the solvent-solute attraction is greater than the solute-solute attraction when two substances are mixed? The solute particles are pulled apart and dispersed throughout the particles of the solvent, which holds the particles of the solute in solution.

Explanation:

If the solvent-solute attraction is greater than the solute-solute attraction then dissolution, solubility, and stability of the solution.

Dissolution: The solute's particles will separate and distribute throughout the solvent during dissolution. This process is called dissolution. The solute-solvent interactions are broken and replaced by new solute-solvent attractions as the solvent molecules around the solute particles.

Solubility: The greatest quantity of a solute that may dissolve in a given amount of solvent at a certain temperature is known as its solubility. The solute has a better probability of dissolving in the solvent when the solvent-solute attraction is stronger than the solute-solute attraction. This implies that the solute will become more soluble in the solvent.

Solution Stability: A solution has a greater tendency to remain stable when the solvent-solute attraction is stronger. A homogenous mixture is produced by the solute particles remaining scattered throughout the solvent.

Thus, the solute particles will dissolve in the solvent, increasing solubility and generating a stable solution, when the solvent-solute attraction is stronger than the solute-solute attraction.

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The correct option is D:atoms with high electronegativities will not lose electrons, so instead they share electrons to reach a stable number of valence electrons

What do we mean by covalent bond-

A covalent bond is a chemical bond in which two atoms share electrons in such a way that they both attain a noble-gas configuration.

The sharing of valence electrons between atoms is known as a covalent bond.Some atoms lacks or has an extra electron in its outermost state,gaining or losing an electron from their outermost state can lead to stable configuration of both the species reducing their energy levels.Covalent bond is formed between an electronegative species(reciever) and electropositive species(donor),in which the electron is shared.

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Answer:

A

Explanation:

The bubbles formed from the plants are always oxygen. The photosynthetic reaction taking place in the plants release oxygen molecules.

Photosynthesis is the biochemical process of synthesizing chemical energy by green plants with the aid of light energy. They store this chemical energy in the form of glucose.

In photosynthetic reaction, water and carbon dioxide are combined to produce glucose and oxygen gas. The bubbles formed in the reaction is oxygen gas.

This process is an event in the carbon cycle to balance the amount of carbon dioxide in the atmosphere and in living matter. Photosynthesis provide the sufficient oxygen for respiration for animals. Hence, option A is correct.

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Answer: V2= 15.0403226 Liters

Explanation:

Use V1/T1=V2/T2

Make sure you change the degrees Celsius to Kelvin. (Kelvin = degrees Celsius +273)

10.0L / 248 K = V2/ 373 K

Cross multiply V1 and T2 and divide by T1

(10.0 L)( 373K)/ 248 K = V2

V2= 15.0403226 Liters (Kelvin cancels out)

Answer:

\(\huge\boxed{\sf t = 50 \ seconds}\)

Explanation:

Acceleration = a = 0.4 m/s²

Initial Speed = \(V_i\) = 20 m/s

Final Speed = \(V_f\) = 40 m/s

Time = t = ?

\(\displaystyle a =\frac{V_f-V_i}{t}\)

Rearranging formula for t

\(\displaystyle t =\frac{V_f-V_i}{a} \\\\t = \frac{40-20}{0.4} \\\\t = \frac{20}{0.4} \\\\\boxed{t = 50 \ seconds}\\\\\rule[225]{225}{2}\)

Answer:

50 seconds

Explanation:

Equation used :

v = u + at

Given :

⇒ a = 0.4 m/s²

⇒ u = 20 m/s

⇒ v = 40 m/s

Solving :

⇒ 40 = 20 + 0.4t

⇒ 0.4t = 20

⇒ t = 20/0.4

⇒ t = 50 seconds