You find yourself in a room with dark gray walls. Medeleev’s image says, “This element is essential for plant life to thrive and is found in heavy clay minerals and the ash from your campfire.” What element are these walls made from?

it takes specific amount of energy to remove exactly one electron from an atom.

What is electron?

Electron is a stable sub atomic particle with a charge of negative electricity found in all atoms and acting as the primary Carrier of electricity in solid.

1-This is shown by the equation where the orbit of the electron around a proton is equal to the quantum. The quantities energy level, times a wavelength.

2-So this is this equation and then abruptly hypothesis links quantities. Energy states with a standing wave function so as that the energy of the election on increases its orbit must also increase.

3- And as considering the wavelength, we're assuming station is constant. Two pies are the only constants, and they aren't changing. It does.

4-As the energy or quantifies energy level of an electron increases its radius around the nucleus must increase.

5- Also, if its energy level decreases, its radius must also decrease. So this hypothesis ties together quantities, energy levels and the relationship and its relationship with the size of the circumference around it. A nucleus which is also the electron.

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Answer:

There are approximately 1.43 x 10^23 bromine atoms in 30.1 g of CH2Br2.

Explanation:

Calculate the molar mass of CH2Br2:

M(CH2Br2) = M(C) + 2M(H) + 2M(Br)

M(CH2Br2) = 12.01 g/mol + 2(1.01 g/mol) + 2(79.90 g/mol)

M(CH2Br2) = 252.82 g/mol

Calculate the number of moles of CH2Br2:

n = m/M

n = 30.1 g / 252.82 g/mol

n = 0.119 mol

Determine the number of bromine atoms:

There are 2 bromine atoms in each molecule of CH2Br2, so we can use Avogadro's number to convert moles to atoms:

N = n * N_A * 2

N = 0.119 mol * 6.022 x 10^23 atoms/mol * 2

N = 1.43 x 10^23 bromine atoms

A reactant or product being added to or removed Variations in the container's volume Addition of an inert gas

Dangerous gas emissions are also coming from the planet's surface. Human activity has caused the atmosphere's quantities of carbon dioxide, methane, tropospheric ozone, and nitrous oxide to rise dramatically above pre-industrial levels.

The plural version of the word "gas" is "gase," and it refers to a substance that expands to fill any container. Many distinct meanings can be assigned to third-person present tense verbs, such as "gasses."

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Answer: A

Explanation:

The -ane suffix implies that the compound has only single bonds for carbon-carbon bonds. The but- prefix implies that the compound consists of four carbons. Since 4 bonds are required for each carbon, there will be a total of 10 hydrogen atoms: 3 on each carbon at the end of the chain and 2 for each carbon in the middle of the chain. Thus, butane is A.

To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

The balanced reaction equation of the reaction is; 2H2O + O2 → 2H2O2

This is a chemical equation that represents the reaction between water (H2O) and oxygen (O2) to form hydrogen peroxide (H2O2). The coefficients in front of each substance indicate the relative number of molecules involved in the reaction.

Recall that we can balance the reaction equation  by ensuring that the atoms of the elements on both sides of the reaction equation are the same as we have above.

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Answer:

Calculate the volume (in mL) of the 1.356 M stock NaOH solution needed to prepare 250.0 mL ... Glucose (molar mass=180.16 g/mol) is a simple, soluble sugar ... g of glucose in enough water to make 500.0 mL of solution. • Step 2: Transfer 18.6 mL of the glucose

Explanation:

For the 6s subshell, the magnetic quantum number is zero while for the 4f subshell we have -3, -2, -1, 0, 1, 2, 3.

The magnetic quantum number takes on values between 0 to (n - l). It gives the orientations of the sublevels. The four types of quantum numbers are;

For the 6s subshell, the magnetic quantum number is zero while for the 4f subshell we have -3, -2, -1, 0, 1, 2, 3.

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Tthe initial temperature of the polystyrene sample is 39.4°C.

Given: Mass of polystyrene sample = 54.2 gSpecific heat of polystyrene = 1.880 J-g°CWater mass = 100.0 g Initial water temperature = 21.0°CWater final temperature = 34.3°CPressure remains constant at 1 atmFormula used:Heat gained by water = heat lost by polystyreneHence,Heat lost by polystyrene = Heat gained by water=> mcΔT = mcΔTwhere,m = mass of polystyrene or waterc = specific heat capacityΔT = change in temperatureThe temperature change is ΔT = 34.3°C - 21.0°C = 13.3°CNow we can use this temperature change to calculate the initial temperature of the polystyrene.Taking the water's specific heat capacity, c = 4.184 J/g°CHeat gained by water = (100.0 g)(4.184 J/g°C)(13.3°C) = 5574 JHeat lost by polystyrene = 5574 JTaking the polystyrene's specific heat capacity, c = 1.880 J/g° ) = 13.3°C Now let's calculate the mass of polystyrene using the specific heat capacity formula.5574 J = (54.2 g)(1.880 J/g°C)(13.3°C - Ti)Ti = 39.4°C

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Answer:

Seismic waves can travel through the Earth's inner layers, but surface waves can only move along the surface of the planet like ripples on water.

Answer:

683838447745 anmmlllkkkkk

Answer:

1 Al(NO3)3 + 1 (NH4)3PO4 → 1 AlPO4 + 3 NH4NO3

Explanation:

To balance Al(NO3)3 + (NH4)3PO4 → AlPO4 + NH4NO3 you'll need to be sure to count all of the atoms on each side of the chemical equation.  Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation.

Important tips for balancing chemical equations:

Answer:

Explanation:

Aniline is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine.

Answer:

Calcium atom:
20 protons, 20 electrons
Calcium 2+ ion:
It is a calcium atom but with 2 fewer electrons, so
20 protons,  18 electrons
Oxygen atom:
8 protons and 8 electrons
Oxygen 2- ion:
It is an oxygen atom but with 2 more electrons, so
8 protons, 10 electrons
Calcium oxide:
Add protons and electrons of of Ca with O to get:
20 + 8 protons = 28 protons, 20 + 8 electrons: 28 electrons.
Alternatively, add protons and electrons of Ca{2+} and O{2-} to get the same result.

The correct number of protons and electrons of the given ions are as follows:

The number of protons and electrons in an atom or ion determines the overall charge of the ion or atom.

In a neutral atom, the number of protons and electrons are equal, hence, the overall charge of the atom is 0. However, in a charged atom (ion), the difference between the proton and electron number is the base.

It is important to note that the number of protons is the atomic number of an atom, hence, does not change. However, the number of electrons changes depending on whether electrons are gained or lost.

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The diatomic gas ( X2 ) is N₂ dinitrogen.

Dinitrogen is a chemical compound fashioned from the covalent bonding of two nitrogen atoms. it's far a colorless, odorless gas at room temperature and pressure, which makes up about seventy-eight % of the Earth's environment.

Diatomic gas is a chemical compound formed from the covalent bonding of two nitrogen atoms. it's miles drab, odorless gasoline at room temperature and stress, which makes up about seventy eight % of the Earth's surroundings.

Volume = 6.4 L

Pressure = 1.3 atm

Temperature = 25 C = 298 K

R = 0.08206 L.atm/mol.K

P * V = n * R * T

1.3 atm * 6.4 L = n * 0.08206 L.atm/mol.K * 298 K

n = 0.34 moles

difference of mass is the mass of gas = 9.5 g

Molar mass = Mass / No. of moles = 9.5 g / 0.34 moles = 27.9 g/mol

diatomic gas with molar mass 28 g/mol is N2

Hence the diatomic molecule is N2      

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The difference between repetition and replication include the following:

This involves the process of copying or duplicating something from a source material and the result is usually the same.

On the other hand repetition refers to performing activities multiple times and doesn't involve duplication which is why the results gotten may be different depending on the conditions involved.

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The dissociation of cadmium chloride is as follows: CdCl₂(s) → Cd⁺²(aq) + 2Cl⁻(aq)

Dissociation is the process by which a compound body breaks up into simpler constituents; said particularly of the action of heat on gaseous or volatile substances.

It is a chemical reaction in which a compound breaks apart into two or more components. The general formula for a dissociation reaction follows the form:

AB → A + B

According to this question, cadmium chloride undergoes dissociation into cadmium and chlorine ions as follows:

CdCl₂(s) → Cd⁺²(aq) + 2Cl⁻(aq)

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Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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1a. The theoretical percentage of water in nickel(II) sulfate heptahydrate is 44.9%

1b. The theoretical percentage of water in aluminum chloride hexahydrate is 44.7%

The percentage of water in nickel(II) sulfate heptahydrate, NiSO₄.7H₂O can be obtained as follow:

Percentage of water, H₂O = (mass of H₂O / mass of NiSO₄.7H₂O) × 100

Percentage of water, H₂O = (126 / 280.7) × 100

Percentage of water, H₂O = 44.9%

The percentage of water in aluminum chloride hexahydrate, AlCl₃.6H₂O can be obtained as follow:

Percentage of water, H₂O = (mass of H₂O / mass of AlCl₃.6H₂O) × 100

Percentage of water, H₂O = (108 / 241.5) × 100

Percentage of water, H₂O = 44.7%

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Answer:

The increase in human population has impacted Earth's resources in several major ways:

• Increased demand for food, water, and shelter. A larger population requires massive increases in food, water, and living spaces which strains natural resources and infrastructure. Producing enough food alone is a significant challenge.

• Accelerated consumption of resources. As population grows, the use of resources like forests, minerals, fossil fuels also increases rapidly to meet demands. This accelerated depletion of resources threatens long term sustainability.

• Increased pollution. A bigger population produces more pollution, waste, emissions, and environmental degradation as a byproduct of energy usage, transportation, industrialization, and land/resource use. This pollution harms ecosystems and contaminates the air, water and land.

• Biodiversity loss. As natural habitats are destroyed or fragmented to enable more human use, many plant and animal species lose their homes and face a higher risk of extinction. Tropical rainforests, in particular, have been heavily impacted.

• Inequality. While resources are limited, population growth often exacerbates inequality in access to and distribution of resources. Poor or developing regions typically have the highest populations but fewest resources per capita.

• Migration and conflict. Shortages of resources in certain areas or regions may lead to migration, economic troubles, social unrest, and in some cases even resource conflicts or wars.

• Slower development. Extremely rapid population growth rates make it difficult for governments, organizations and societies to effectively manage development, improve standards of living, advance technology, and make other progress at an optimal pace. Slower, more stabilized population growth may enable a higher overall quality of life.

So in many profound and troubling ways, increased population size has created immense pressures on Earth's resources and made it more difficult to meet present and future needs in a sustainable manner. Most experts agree that slowing population growth is critical to ensuring resource security for future generations.

Explanation:

X contains metallic bond

Y contains ionic bond

Z contains covalent bond

We know that the crystal structure of a compound would have to do with the way that the atoms and the elements that compose the compound could be said to have been arranged. Thus if a compound is said to have a crystal structure then we can say that the compound would be crystalline in nature as we can see from the table that we have in the question here.

The kind of bonds that we have in the compound is about one of things that can be able to determine whether or not the compound has a crystalline structure as we can see.

Looking at the properties of the compounds that have been shown in the bale that has been attached to the answer that we have here, we can be able to make a decision regarding each of the substances shown.

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1. It is also known as the dark reaction of photosynthesis: Off.

2. Primary acceptor of carbon is Photosystem I and II: On.

3. Site of the process is in the stroma: Off.

4. Photolysis of water does not occur: Off.

5. Process type is both cyclic and non-cyclic processes: On.

6. It is a release of oxygen that gives off aldehydes and hydrogen upon dehydrogenation: On.

7. It is a process that converts solar energy into chemical energy: On.

8. It is a light dependent process: On.

9. Process type is cyclic only: Off.

10. Primary acceptor of carbon is Rubiscobisphosphate: Off.

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After the reaction is complete, no nitrogen and no hydrogen molecules remain, and 8.00 x 1014 molecules of NH3 are produced.

In the equation, nitrogen and hydrogen react at a high temperature, in the presence of a catalyst, to produce ammonia, according to the balanced chemical equation:N2(g)+3H2(g)⟶2NH3(g)The coefficients of each molecule suggest that one molecule of nitrogen reacts with three molecules of hydrogen to create two molecules of ammonia.

So, to determine how many molecules of ammonia are produced when four nitrogen and nine hydrogen molecules are present, we must first determine which of the two reactants is the limiting reactant.

To find the limiting reactant, the number of moles of each reactant present in the equation must be determined.

Calculations:
Nitrogen (N2) molecules = 4Hence, the number of moles of N2 = 4/6.02 x 1023 mol-1 = 6.64 x 10-24 mol
Hydrogen (H2) molecules = 9Hence, the number of moles of H2 = 9/6.02 x 1023 mol-1 = 1.50 x 10-23 mol

Now we have to calculate the number of moles of NH3 produced when the number of moles of nitrogen and hydrogen are known, i.e., mole ratio of N2 and H2 is 1:3.

The mole ratio of N2 to NH3 is 1:2; thus, for every 1 mole of N2 consumed, 2 moles of NH3 are produced.
The mole ratio of H2 to NH3 is 3:2; thus, for every 3 moles of H2 consumed, 2 moles of NH3 are produced.
From these mole ratios, it can be observed that the limiting reactant is nitrogen.

Calculation for NH3 production:
Nitrogen (N2) moles = 6.64 x 10-24 moles
The mole ratio of N2 to NH3 is 1:2; therefore, moles of NH3 produced is 2 × 6.64 × 10−24 = 1.33 × 10−23 moles.

Now, to determine how many molecules of NH3 are produced, we need to convert moles to molecules.
1 mole = 6.02 x 1023 molecules
Thus, 1.33 x 10-23 moles of NH3 = 8.00 x 1014 molecules of NH3 produced.

To find the amount of each reactant remaining after the reaction is complete, we must first determine how many moles of nitrogen are consumed, then how many moles of hydrogen are consumed, and then subtract these from the initial number of moles of each reactant.

The moles of nitrogen consumed = 4 moles × 1 mole/1 mole N2 × 2 mole NH3/1 mole N2 = 8 moles NH3
The moles of hydrogen consumed = 9 moles × 2 mole NH3/3 mole H2 × 2 mole NH3/1 mole N2 = 4 moles NH3
Thus, the moles of nitrogen remaining = 6.64 × 10−24 mol – 8 × 2/3 × 6.02 × 10^23 mol-1 = 5.06 × 10−24 mol
The moles of hydrogen remaining = 1.50 × 10−23 mol – 4 × 2/3 × 6.02 × 10^23 mol-1 = 8.77 × 10−24 mol

Finally, the number of molecules of each reactant remaining can be calculated as follows:
Number of N2 molecules remaining = 5.06 × 10−24 mol × 6.02 × 10^23 molecules/mol = 3.05 × 10−1 molecules ≈ 0 molecules
Number of H2 molecules remaining = 8.77 × 10−24 mol × 6.02 × 10^23 molecules/mol = 5.28 × 10−1 molecules ≈ 0 molecules.

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the answer is D hope it helps :)

The second circle has the greatest number of species diversity .

The term genetic diversity has to do with the existence of different species in a habitat. We know that due to natural selection, only the organisms that have traits that enable them to survive longer and reproduce are better adapted in the ecosystem. Thus, other species may begin to dwindle and even disappear in the ecosystem.

Genetic diversity ensures that there are different species in the habitat. In each circle, we see that the colors represent the different species of the organisms in the habitat. The habitat with the most number of different colors is the habitat that has the greatest magnitude of species diversity.

Hence, the second circle has the greatest number of species diversity as indicated in the image attached to this answer.

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Answer:

Explanation:

Which of the following is most likely to be ductile?

a. Metal
b. Nonmetal
c. Metalloid
d. Gas

Answer: a. MetalMetal

Answer:

56.96 grams

Explanation:

To find the mass of 1.78 moles of O2, we need to use the molar mass of O2, which is the mass of one mole of O2.

The chemical formula for O2 is O-O or simply O2. The molar mass of O2 is the sum of the atomic masses of two oxygen atoms, which can be found on the periodic table.

The atomic mass of oxygen (O) is approximately 16.00 g/mol. So the molar mass of O2 is:

Molar mass of O2 = 2 x atomic mass of O

= 2 x 16.00 g/mol

= 32.00 g/mol

Therefore, the mass of 1.78 moles of O2 is:

Mass = number of moles × molar mass

= 1.78 mol × 32.00 g/mol

= 56.96 g

So the mass of 1.78 moles of O2 is 56.96 grams.