Considering the temperature vs. time graph below, how does the temperature at the beginning of a change of state compare with the temperature at the end of the change?

Answer:

Nitrogen (N2)

Explanation:

it has a total of 7 electrons occupying it's shells... that's due to its atomic number of 7

1.  The 4s subshell should be filled before the 3d subshell because the 4s subshell is at lower energy than the 3d subshell.

Electrons fill the subshells in order of increasing energy.

2.  To write the electron configuration for the Na^+ ion, which has ten electrons, follow these steps:
  a. Begin with the lowest energy subshell, which is 1s.
  b. Fill the subshells with electrons in increasing energy order: 1s, 2s, 2p, 3s, and so on.
  c. Stop when you've added ten electrons.
The electron configuration for the Na^+ ion is: 1s^2 2s^2 2p^6

3. To write the electron configuration for the Br^- ion, which has thirty-six electrons, follow the same steps as above, but stop when you've added thirty-six electrons.

The electron configuration for the Br^- ion is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6

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Answer:

Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain.

Explanation:

The intensive properties is ;

The density of water at 25°C is 1.00 g/mL..

Intensive properties are properties of a substance that do not depend on the amount of the substance present, but only on its temperature, pressure, and other conditions.

We have to note that the density does not depend on the amount of the substance that is present then it follows that the density that we have is an intensive property.  It does not depend on the amount of the substances that we have here.

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a) Magnesium, 2.8.2, Group number 2,Metals, They are not non metals.

b) Fluorine, 2.2.5, Group number7, Metal No, Non-Metal yes

c) Carbon, 2,2,2. Group number 4, Metal No, Non-Metal yes

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.

Answer: Changing the number of electrons will change the overall charge on an atom.

Explanation:

An atom that loses electrons will become positively charged and an atom with added electrons will become negatively charged. ... A charged atom is called an ion.

Everything else being equal, a gradual increase in atmospheric CO2 would most likely bring about (4) an increase in surface temperature.

CO2 is a greenhouse gas, which means that it absorbs infrared radiation and contributes to the warming of the Earth's atmosphere. As the concentration of CO2 in the atmosphere increases, it traps more heat and leads to an increase in surface temperature. This effect is known as the greenhouse effect.

The increase in temperature can have many consequences, including changes in precipitation patterns, rising sea levels, and more frequent and severe weather events. However, it is important to note that other factors, such as changes in solar radiation and volcanic activity, can also affect the Earth's climate.

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Answer:

1st Blank: 1 Co

2nd Blank: 2 Na2S

3rd Blank: 4 Na

4th Blank: 1 CoS2

Explanation:

Trust me

Answer:

The diagram represents the general equation for photosynthesis.

What does the X represent?

Explanation:

Carbon dioxide

Explanation:

charged particles=8 which is proton and proton=no.of electron. That's why 8 particles are revolving round this center. And this atom structure is of oxygen

If the center of an atom has 8 charged particles that are protons as the neutrons are neutral there will be 8 negative charges that are electrons revolving around the center nucleus.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether it is  solid,liquid or  gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged particles  and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged  particles and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Reactivity decreases as you move from left to right. The farther to the left and down the periodic chart you move, easier it is for electrons to be given or taken away, hence resulting in higher reactivity.

Reactivity decreases as we move down the column. As you learn more about the table, you will be able to find that this pattern is true for other families.

The atoms get bigger, as the atomic number increases. The chemical properties change slightly when compared to the element right above them on the table. The non-metal elements in Group 7 that are known as the halogens, get less reactive as you move to the down of the group.

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Answer:

nothing

Explanation:

hope this helps ;)

When you get into a car that has been sitting in the sun for a while, there are several noticeable things that may occur. Here are some of the common observations:

1. Heat: One of the first things you'll notice is the intense heat inside the car. This is because the sun's rays have been absorbed by the car's exterior and trapped inside, creating a greenhouse effect. The temperature inside the car can become significantly higher than the temperature outside.

2. Hot Surfaces: The surfaces inside the car, such as the seats, dashboard, steering wheel, and metal parts, can become extremely hot to the touch. This is due to the absorption of heat from the sun. It's important to be cautious and avoid direct contact with these hot surfaces to prevent burns or discomfort.

3. Odor: The interior of the car may have a distinct smell when it has been sitting in the sun for a while. This is often referred to as the "hot car smell." It is caused by the combination of materials, such as upholstery, plastic, and carpet, heating up and emitting a specific odor.

4. Fading or Discoloration: Prolonged exposure to sunlight can cause fading or discoloration of materials inside the car. For example, the upholstery, dashboard, and other surfaces may gradually lose their original color and become faded or discolored over time.

5. Glare: When you first enter a car that has been sitting in the sun, you may notice a strong glare from the sunlight reflecting off the windshield and other glass surfaces. This glare can make it difficult to see clearly and may require the use of sunglasses or adjusting the sun visors to minimize the brightness.

It's important to note that these observations may vary depending on factors such as the intensity of the sunlight, the duration the car has been in the sun, and the materials used in the car's interior. Regular maintenance and taking precautions, such as using sunshades or parking in shaded areas, can help minimize some of these effects.

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Like any other equilibrium constant, kw is also affected by temperature. the kw at 75 degrees Celsius is 1.995 x 10⁻¹³. Therefore, 13 is the pOH of water at this temperature.

The concentration of hydroxide ions (OH-) is measured by pOH. It is utilized to express a solution's alkalinity.

Aqueous solutions having pOH less than 7 at 25 degrees Celsius are alkaline, pOH larger than 7 are acidic, while pOH equal with 7 are neutral. pH and hydrogen ion concentration is used to compute pOH.

Kw = [OH⁻] [H⁺]

1.995 x 10⁻¹³ = Kw

[OH⁻] =[H⁺]

Kw = [OH⁻]²

[OH⁻] =10⁻¹³

pOH = -log  [OH⁻]

       = - log  10⁻¹³

      = 13

Therefore,  13 is the pOH of water at this temperature.

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Based on the information provided, the correct order of steps required to predict the volume of 0.200 M sodium carbonate needed to produce 2.00 g of calcium carbonate is:

Step 1: Identify the molar mass of calcium carbonate (CaCO3)

Step 2: Convert the given mass of calcium carbonate to moles using its molar mass

Step 3: Use the balanced chemical equation to determine the mole ratio between calcium carbonate and sodium carbonate

Step 4: Calculate the amount of moles of sodium carbonate required

Step 5: Convert the moles of sodium carbonate to volume in liters using its molarity

Step 6: Convert the volume in liters to milliliters

Therefore, the correct order of steps is:

Step 1: Identify

Step 2: Convert

Step 3: Compute

Step 4: Convert

Step 5: Convert

Step 6: Check

Using the given information, the calculation can be done as follows:

Step 1: The molar mass of calcium carbonate (CaCO3) is given as 100.09 g/mol.

Step 2: The given mass of calcium carbonate is 2.00 g. Therefore, the number of moles of calcium carbonate can be calculated as follows:

2.00 g / 100.09 g/mol = 0.01998 mol ≈ 0.020 mol

Step 3: According to the balanced chemical equation, the mole ratio between calcium carbonate and sodium carbonate is 1:1. Therefore, the amount of moles of sodium carbonate required is also 0.020 mol.

Step 4: The molarity of the sodium carbonate solution is given as 0.200 M. Therefore, the volume of sodium carbonate solution required in liters can be calculated as follows:

0.020 mol / 0.200 mol/L = 0.100 L = 100 mL

Step 5: The volume in liters needs to be converted to milliliters:

0.100 L x 1000 mL/L = 100 mL

Step 6: Check the answer to make sure it is reasonable and makes sense.

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Explanation:

When the water add acid there have the reaction then the molecules are evolve highly reactive which have produce bubble which cause our face directly but acid add in water there have less reactive molecules evolve ant there doesnot produce bubble

Given what we know, we can confirm that since Mr. Summers has to test a hypothesis, his next step should be to design an experiment.

Therefore, we can confirm that Mr. Summers must design an experiment given that this is the best way to gather data in order to be analyzed in the future and draw a valid conclusion.

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Answer:

Water is the primary erosion

hope it helps :)

Answer:

NaOH atomic mass is 39.977

pH is 11 due to dilution must be multiplied by 0.11 to find pH

39.977 x 0.11 = 0.43979 x 100%

43% pH

Answer:

Ionic

Explanation:

Lithium is an alkali metal and form an ionic bond by donating an electron.

Fluorine is a halogen and forms ionic bonds by accepting an electron.

Diagramming the formation of an ionic bond between lithium and fluorine looks exactly like the diagrammed bond between sodium and chlorine in the video below. Lithium behaves just like the sodium (Na) and fluorine will act like the chlorine (Cl).

The expression for α0, α1, and α2 implicated in the speciation of H2CO3 into HCO3- and CO32- are:

(2)These reactions can be defined using the acid dissociation constant (Ka) of H2CO3 as follows:

From these definitions, the acid dissociation constants for H2CO3's first (Ka1) and second (Ka2) dissociation reactions can be expressed as shown below:

An acid is a molecule or ion that can donate a proton, or, alternatively, can form a covalent bond with an electron pair. The first category of acids is the proton donor or Brønsted acid. In the special case of an aqueous solution, the proton donor forms the hydronium ion H₃O⁺ and is known as an Arrhenius acid. PH is the degree of acidity or alkalinity of a solution, expressing the negative logarithm of the concentration of H ions with a base number of 10. Neutral solutions have a PH of 7, acids less than 7, bases greater than 7. In waters that are not polluted, PH is controlled by CO2 ions, Carbonates and Bicarbonates.

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Answer:

yo te diria que el elastico amigo es esa

One example of a real-world item that is organized or sorted in a specific way is a library's book collection. The books are typically sorted using the Dewey Decimal Classification system, which categorizes them based on subject matter.

There are many types of real-world items that are organized or sorted in specific ways. One example is a library. Libraries organize books according to various systems, such as the Dewey Decimal System or the Library of Congress Classification System. These systems allow books to be organized by subject matter, author, and other criteria, making it easier for patrons to locate specific books or browse for new ones. In addition, libraries often have specific sections for different types of materials, such as reference books, periodicals, and audiovisual materials.

This organization helps users to find the specific type of material they need, while also allowing library staff to manage the collection more efficiently. Overall, many real-world items are organized or sorted in specific ways in order to make them more manageable and user-friendly. Whether it's a library, a grocery store, or another type of organization, these systems help people find what they need and make the most of the resources available to them.

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Answer:

The Eukaryotic cell that the organelle shows below belongs to the Nucleus.

Explanation:

In fact, the mere presence of a nucleus is considered one of the defining features of a Eukaryota cell.

Answer:

Like Earth, it gets plenty of sunlight. We don’t see the far side because “the moon is tidally locked to the Earth,” said John Keller, deputy project scientist for NASA’s Lunar Reconnaissance Orbiter project. “The moon does rotate, but it rotates at the same speed that it rotates around the Earth.”

Explanation:

Answer:0.19m

Explanation:

Molality (m) of the solution is  = 0.192 mol/kg. Molality (also molal concentration) is represented by symbol m, it measures the number of moles of solute (here a non-electrolyte solute A) present  in 1 kg of solvent. Here, moles of solute can be calculated by dividing given mass of non-electrolyte A with molecular weight of A.

Molecular mass of non-electrolyte A = 60g

Mass of non-electrolyte A = 6g

Volume of solution = 500mL

Density of solution = 1.05g

To calculate molality of solution using formula of molality:

Molality = moles of solute / kilograms of solvent (mol/kg). Here we need to calculate mass of the solvent in kg that is not directly given in the question. Hence, it is required to calculate mass of the solution first and then subtract the mass of solute from it. Also, to calculate the mass of solution, density and volume are given. So, the calculations are done as follows;

Firstly,

To calculate mass of solution using formula of density; D (ρ) = mass/volume. Density (ρ) is the mass of substance divide by it's volume. Therefore, Mass of solution = Density  × volume

Mass of solution = 1.05 × 500

Mass of solution = 525 g

Now, Mass of solvent is calculated as Mass of solute (non-electrolyte A) subtracted from mass of solution. Therefore,

Mass of solvent = 525 - 6 = 519 g (0.519 kg)

Moles of solute are calculated as given weight of solute divided by molecular weight of solute. Hence, moles of solute = 6/60

Moles of solute = 0.1

Molality of solution is calculated as moles of solute divided by mass of solvent or kilograms of solvent (mol/kg)

Molality of solution = 0.1/ 0.519

Molality (m) = 0.192 mol/kg

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To act as an effective coolant in a car's radiator, a substance has to have the capacity to absorb a great deal of heat. The physical property is the best indicator for a good coolant is specific heat.

Specific heat capacity of the substance  is the amount of heat energy required raise the temperature of the substance. A coolant should have the high specific heat capacity.  The large amount of heat is required for a coolant to raise their temperature and if the coolant have high heat capacity it can absorb large amount of heat without heating much.  The specific heat is the physical property of a substance.

Thus, To act as an effective coolant in a car's radiator, a substance has to have the capacity to absorb a great deal of heat. The physical property is the best indicator for a good coolant is specific heat.

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The chemical formula Mn₂(CO₃)₃ represents a compound composed of manganese (Mn) and carbonate (CO₃) ions and contains 2 manganese atoms, 9 carbon atoms, and 9 oxygen atoms.

To determine the number of atoms of each element in the compound, we need to break down the formula and analyze the subscripts.

Breaking down the formula

- Mn₂ indicates that there are two manganese atoms in the compound.

- (CO₃)₃ indicates that there are three carbonate ions in the compound. Each carbonate ion consists of one carbon atom (C) and three oxygen atoms (O).

Analyzing the carbonate ion

Since there are three carbonate ions in the compound, we need to multiply the number of atoms in each ion by three:

- There are three carbon atoms (C) in each carbonate ion, so in total, there are 3 x 3 = 9 carbon atoms.

- There are three oxygen atoms (O) in each carbonate ion, so in total, there are 3 x 3 = 9 oxygen atoms.

Summing up the atoms

- Manganese (Mn): 2 atoms

- Carbon (C): 9 atoms

- Oxygen (O): 9 atoms

Therefore, the compound Mn₂(CO₃)₃ contains 2 manganese atoms, 9 carbon atoms, and 9 oxygen atoms.

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