Electrons _______ around the nucleus of an atom.
Options:
- valence electrons
- atomic number
- atomic mass
- amu - atomic mass unit
- ionization energy
- electronegativity
- ionic bond
- covalent bond
- metallic bond

Answer:

check the picture down below

Explanation:

The partial pressure of the nitrogen gas from the calculation is 4.94 kPa

When all other gases in a mixture are held constant, a gas's partial pressure is the pressure it exerts on its own. It is calculated by dividing the total pressure of the gas mixture by the percentage of the mixture's total volume occupied by the specific gas.

Partial pressure of nitrogen = Total pressure - (Partial pressure of carbon dioxide + Partial pressure of oxygen + Partial pressure of other gases)

= 101.3 - (21.22 + 75.1 + 0.04)

= 4.94 kPa

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Answer:

4 electrons were gained

Explanation:

Here, we want to get the number of electrons gained or lost

From what we have, there was a change from a positive value to a negative one

Since electrons are negatively charged entities, it means that the nitrogen atoms gained electrons.

For the change to have occurred, there must have been a matching of two electrons initially, then another two electrons

Thus, we have the total number of electrons gained as 4

Answer:

6.022 x 10^23 particles

Explanation:

Chemists have chosen to count atoms and molecules using a unit called the mole (mol), from the Latin moles, meaning “pile” or “heap.”

One mole is 6.022 x 10^23 of the microscopic particles which make up the substance in question.

Hope this helped! :^)

Answer:

d) Copper(I) sulfate

Explanation:

please mark be brainliest

Answer:

Copper (i) iodide

Cu is copper and I is iodine

The pH of a solution with a concentration of 5.77 x 10-⁷ M is 6.24.

pH refers to the quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

The pH of a substance can be calculated using the following expression:

pH = -log H

Where;

According to this question, the concentration of a solution is 5.77 × 10-⁷M. The pH can be calculated as follows:

pH = - log 5.77 × 10-⁷M

pH = 6.24

Therefore, 6.24 is the pH of the solution

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Answer:

nucleus is a collection of particles called protons,which are positively charged..and neutrons which are electrically neutral..electrons which are negatively charged..and neutrons are in turn made up of particles called quarks ..

Explanation:

hope this helps u ...

Answer:

The Nucleus is made up of protons and neutrons.

Answer:

Interphase

Explanation:

I think you answered your own question chief? lol

Answer:

Explanation:

Heres your answer! (or what I think is) A cell cycle is a series of events that takes place in a cell as it grows and divides. A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division.

As the atomic number increases, the reactivity of the halogens decreases. Fluorine and chlorine exist as gases at room temperature, while bromine is a liquid, and iodine is a solid.

Answer:

As the atomic number increases, the reactivity of the halogens decreases. Fluorine and chlorine exist as gases at room temperature, while bromine is a liquid, and iodine is a solid.

Answer:

2.46 × 10²⁵ atoms H

Explanation:

Avagadro's Number: 6.022 × 10²³

Step 1: Find formulas

Hydrogen - H

Ammonium Sulfide - (NH₄)₂S

Step 2: Use Dimensional Analysis

\(5.10 \hspace{3} mol \hspace{3} (NH_4)_2S(\frac{8 \hspace{3} mol \hspace{3} H}{1 \hspace{3} mol \hspace{3} (NH_4)_2S})(\frac{6.02(10)^{23} \hspace{3} atoms \hspace{3} H}{1 \hspace{3} mol \hspace{3} H} )\) =

Step 3: Simplify

We have 3 sig figs.

2.45616 × 10²⁵ atoms H ≈ 2.46 × 10²⁵ atoms H

In order to find the hydronium ion concentration in this solution, we have to find the pH and we are given the pOH of the reaction, 8.30. The pH and pOH can be used in the same formula to equal 14, which is the highest value of pH, within normal conditions, and the pH and pOH are always opposites in this scale, therefore the formula will be:

pH + pOH = 14

pH = 14 - 8.30

pH = 5.7

Now that we have the pH, we can find the [H3O+], which can be found in the following formula:

[H3O+] = 10^-pH

[H3O+] = 10^-5.7

[H3O+] = 1.99*10^-6, letter B

Answer:

B

Explanation:

The mass of hydrogen needed to produce 51.0 grams of ammonia is  ≈ 9.07 grams.

To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.

From the balanced chemical equation:

3 H₂(g) + N₂(g) → 2 NH₃(g)

We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).

First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.

Number of moles of NH₃ = Mass / Molar mass

                     = 51.0 g / 17.03 g/mol

                     ≈ 2.995 moles

Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.

Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃

           = (2.995 moles × 3) / 2

           ≈ 4.493 moles

Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).

Mass of H₂ = Moles × Molar mass

          = 4.493 moles × 2.02 g/mol

          ≈ 9.07 grams

Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.

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Answer:

ethyl ethanoate

Explanation:

it helps you

The term "molar volume" (Vm) of an ideal gas refers to this amount. (STP) as 293 kelvin (K) of temperature and 1 atmosphere of pressure (P = 1 atm, which is also equal to 760 torr). Any ideal gas has a 22.4 L molar volume at STP.

The volume occupied through one mole of the a chemical element or chemical compound at a standard temperature and pressure (STP) is known as the molar volume (Vm). By dividing the mass density () by the molar mass (M), it can be computed.

One mole of any gas has the same volume when it is present at the same temperature and pressure. The volume that one mole of any gas occupies at standard pressure and temperature is known as the molar volume. 24 dm3 is equivalent to the molar volume (24,000 cm 3). In cases where it is necessary, this volume is provided.

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Answer:

compound

Explanation:

because h is hydrogen, then O is oxygen

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

The water would act as a base and would produce an undesired product of ethanol (CH3OH) through a dissociation reaction. If doing a titration reaction, it will likely yield inaccurate results.

Answer:

About 14.45 seconds

Explanation:

If a object is going 4.5m/s and its destination is 65m then you need to divide.

65÷4.5 = 14.444444

due to the constant 4 you need to round 14.444 so it would be 14.45 seconds.

In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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Option B, where [OH-] is 1.0 x 10-13 mol dm-³3, is the only one that can be considered basic. Therefore, Option B is the correct answer.

To determine whether a solution is basic or acidic at 25 °C, we can compare the concentration of hydroxide ions ([OH-]) with the concentration of hydronium ions ([\(H_3O\)+]). In a neutral solution, the concentrations of [\(H_3O\)+] and [OH-] are equal, resulting in a pH of 7.

Option A states that the concentration of [\(H_3O\)+] is 1.0 x 10-3 mol dm-3. Since [\(H_3O\)+] represents the concentration of hydronium ions, this solution would be acidic because the concentration of [\(H_3O\)+] is higher than [OH-], indicating an excess of hydronium ions.

Option B states that the concentration of [OH-] is 1.0 x 10-13 mol dm-³3. In this case, [OH-] is higher than [\(H_3O\)+], indicating an excess of hydroxide ions. Therefore, this solution would be considered basic.

Option C states that the solution has a pH of 4.00. A pH of 4.00 is below the neutral pH of 7, indicating an excess of hydronium ions and an acidic solution. Therefore, this option does not represent a basic solution.

Option D states that the concentration of [\(H_3O\)+] is 1.0 x 10-13 mol dm-3. Similar to Option A, this concentration of [\(H_3O\)+] indicates an acidic solution, not a basic one.

Option B

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Answer:

D is the correct answer

Explanation:

In order for a solution to be basic at 25 C, the H+ concentration has to be less than the OH- concentration, and given that H+ times OH- is 10^-14, we deduce that H+ must be less than 10^-7 for the solution to be acidic. Thus, A can be eliminated, and so can C. With B, we calculate an H+ concentration of 0.1M, which also fails to be less than 10^-7
Thus, D is the correct answer and we can verify that as H+ is less than 10^-7.



Note: I do not know why my previous answer was deleted for "being incorrect", and i'm not sure how the incorrect answer was "expert verified", but I am as certain that D is the correct answer as i am sure of 3*(4+5-1) being equal to 24.

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

A nuclear equation can be used to represent alpha decay. If the total numbers of protons and neutrons on both sides of the arrow are equal, the equation is balanced.

While all radioactive decay poses a threat to life, alpha decay poses the least threat. beta decay The transformation of the uranium-238 nucleus into the thorium-234 nucleus is an illustration of this decay. Half-lives are another unit used to express the rate of nuclear decay. A particular isotope's half-life is the amount of time it takes for its radioactivity to decay by half. A radioisotope having a half-life of 14 days will have had half of its atoms decay within that time frame. For instance, after generating intermediates like Uranium-234, Thorium-230, and Lead-206, the decay chain that starts with Uranium-238 ends in Lead-206.

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Answer:

neap tide

Explanation:

There are two different types of tides, which are the spring tide and the neap tide.

Neap tides are weak tides which occur when the gravitational forces of the sun and the moon are at right angles to each other with respect to the earth. Since the sun and moon are at right angles, it causes a difference between the low and high tide.

The spring tide are strong tides which occur when the moon, sun and earth are in straight line. The spring tide occur during full moon and new moon.

Answer:

Neap Tides  

The result is a neap tide. The same effect happens during third quarter. These occur during first and last quarter moons. The gravitational pull is not as strong.

Explanation:

the first answer is correct

The partial pressure of hydrogen gas in the mixture is:0.53334 atm.

What is partial pressure?
partial pressure. noun. the pressure that a gas would have if it took up the entire volume that the mixture of gases currently occupies.

P total,and the total number of moles in the mixture would be,

n total=nH2+nO2+nN2

This means that you could write

P total.V=ntotal.RT

p total=n total.RT/V

This is equivalent to

p total=[nH2+nO2+nN2].RT/V

therefore,

P total =PH2+PO2+pN2

now, to get the partial pressure of,let's Hydrogen gas

RT/V=Ptotal/nH2+nO2+nN2

therefore

PN2=XN2.p total

similarly,

PO2=XO2.p total

PN2=XN.p total

The total number of moles will be

\(ntotal\) = 0.40+0.15+0.50=1.50 moles.

\(PH2\)=0.40/1.50*2.0 atm =0.5334 atm.

\(PO2\)=0.15/1.50*2.0 atm =0.2 atm.

\(PN2\)=0.50/1.50*2.0 atm =0.66 atm.

Hence, the partial pressure of hydrogen gas in the mixture is:0.53334 atm.

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2 KMnO4 (aq) + 5 H2O2 (aq) + 3 H2SO4 (aq) → 5 O2 (g) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H2O (l)

Answer:

An increase in the concentration of the reactant in solution causes the reaction rate to increase exponentially - first order

The reaction rate increases in direct proportion to the concentration of the reactant in solution -second order

The reaction rate is constant regardless of the amount of reactant in solution - zero order

Explanation:

The Order of Reaction refers to the power dependence of the rate on the concentration of each reactant. The order of reaction is determined experimentally and not necessarily by inspection.

Typically, in a second order reaction, the rate of reaction increases in proportion to increase in concentration.

For a first order reaction, the rate of reaction increases exponentially as the increase in concentration.

For a zero order reaction, the rate of reaction is independent of the concentration of the reactant.

Answer:

heterogeneous mixture

Explanation:

(a) A mixture with the same composition and properties throughout is called a homogeneous mixture. (b) A mixture, the different parts of which vary in composition and properties, is called a heterogeneous mixture.